Biaxial Minerals

(* - Mineral name not approved by the IMA)
(! - New Dana classification number has been added or changed)
(? - IMA Discredited Mineral Species Name)

Optics	MINERAL
Biaxial (?)	Akaganeite 
Biaxial (-)	Aluminobarroisite !
Biaxial (?)	Armalcolite 
Biaxial (+), 2V(Meas)=60.  Dispersion r < v distinct.	Artsmithite !
Biaxial (?)	Arzrunite 
Biaxial (?)	Barstowite 
Biaxial (?)	Berdesinskiite 
Biaxial (?)	Brinrobertsite !
Biaxial (?)	Cechite 
Biaxial (?)	Clearcreekite !
Biaxial (+)	Cobaltkieserite !
Biaxial (-)	Columbite-(Mn) 
Biaxial (?)	Coronadite 
Biaxial (?)	Davisite !
Biaxial (?)	Deanesmithite 
Biaxial (+)	Dimorphite 
Biaxial (?)	Dmitryivanovite !
Biaxial (?)	Edoylerite 
Biaxial (+)	Eyselite !
Biaxial (?)	Feinglosite !
Biaxial (?)	Ferri-clinoferroholmquistite !
Biaxial (?)	Ferri-ottoliniite !
Biaxial (?)	Ferrochloropargasite !
Biaxial (?)	Fetiasite 
Biaxial (?)	Filipstadite 
Biaxial (?)	Gatelite-(Ce) !
Biaxial (?)	Groutite 
Biaxial (-), 2V(Meas)=large.  Dispersion r > v strong.	Heliophyllite 
Biaxial (?)	Hemloite 
Biaxial (?)	Hollandite 
Biaxial (?)	Howardevansite 
Biaxial (?)	Hydrombobomkulite 
Biaxial (-)	Jahnsite-(CaMgMg) !
Biaxial (-)	Jahnsite-(NaMnMg) !
Biaxial (?)	Janggunite 
Biaxial (?)	Kazakhstanite 
Biaxial (?)	Kozoite-(La) !
Biaxial (?)	Krieselite !
Biaxial (?)	Kyzylkumite 
Biaxial (?)	Lavrentievite 
Biaxial (?)	Lithiowodginite 
Biaxial (-)	Marokite 
Biaxial (+)	Matsubaraite !
Biaxial (?)	Montroseite 
Biaxial (?)	Odinite 
Biaxial (+/-)	Parageorgbokiite !
Biaxial (+)	Paralabuntsovite-Mg !
Biaxial (+)	Parvowinchite 
Biaxial (-)	Prewittite !
Biaxial (?)	Ramanite-(Cs) !
Biaxial (?)	Ramanite-(Rb) !
Biaxial (+)	Rengeite !
Biaxial (?)	Romanechite 
Biaxial (?)	Sanderite 
Biaxial (-), 2V(Meas)=near 90.	Sarabauite 
Biaxial (?)	Schubnelite 
Biaxial (?)	Sodic-ferri-ferropedrizite !
Biaxial (?)	Sosedkoite 
Biaxial (-)	Stibioclaudetite !
Biaxial (?)	Tantite 
Biaxial (?)	Tenorite 
Biaxial (?)	Tivanite 
Biaxial (?)	Todorokite 
Biaxial (?)	Tolbachite 
Biaxial (?)	Tomichite 
Biaxial (?)	Tongbaite 
Biaxial (?)	Tsumgallite !
Biaxial (?)	Tugarinovite 
Biaxial (+)	Vonsenite 
Biaxial (?)	Yuanfuliite 
Biaxial (?)	Zirconolite-3O 
Biaxial (?)	Zorite 
Biaxial (+), a=1.301, b=1.3012, g=1.3068, bire=0.0058, 2V(Calc)=22, 2V(Meas)=11.417.	Ferruccite 
Biaxial (+/-), b=1.308, 2V(Meas)=90.  Dispersion Calculated β index.	Barberiite 
Biaxial (-), a=1.3239, b=1.3245, g=1.3247, bire=0.0008, 2V(Calc)=58, 2V(Meas)=75.	Avogadrite 
Biaxial (-), a=1.332, b=1.504, g=1.504, bire=0.1720, 2V(Calc)=0, 2V(Meas)=7.  Dispersion weak, r < v.	Niter 
Biaxial (+), a=1.3385-1.339, b=1.3389-1.339, g=1.3396-1.34, bire=0.0010-0.0011, 2V(Calc)=0-76, 2V(Meas)=43.  Dispersion none.	Cryolite 
Biaxial (-), a=1.34, b=1.506, g=1.506, bire=0.1660, 2V(Calc)=0, 2V(Meas)=5.	Nitromagnesite 
Biaxial (-), a=1.34, b=1.456, g=1.459, bire=0.1190, 2V(Calc)=16, 2V(Meas)=5.  Dispersion none.	Sassolite 
Biaxial (+), a=1.346, b=1.348, g=1.35, bire=0.0040, 2V(Calc)=88, 2V(Meas)=83.	Weberite 
Biaxial (-), a=1.351, b=1.459, g=1.486, bire=0.1350, 2V(Calc)=48, 2V(Meas)=50.	Qilianshanite 
Biaxial (-), a=1.358, b=1.479, g=1.53, bire=0.1720, 2V(Calc)=60, 2V(Meas)=62.  Dispersion r < v weak.	Barentsite 
Biaxial (?), a=1.359, b=1.359, g=1.359, bire=0.0000	Simmonsite !
Biaxial (?), a=1.364, g=1.367,  bire=0.0030	Neighborite 
Biaxial (-), a=1.365, b=1.53, g=1.595, bire=0.2300	Glushinskite 
Biaxial (-), a=1.377, b=1.503, g=1.583, bire=0.2060	Nahcolite 
Biaxial (-), a=1.38, b=1.482, g=1.578, bire=0.1980, 2V(Calc)=82, 2V(Meas)=81.5.	Kalicinite 
Biaxial (-), a=1.388, b=1.479, g=1.486, bire=0.0980, 2V(Calc)=28, 2V(Meas)=27.	Darapskite 
Biaxial (-), a=1.396, b=1.4103, g=1.419, bire=0.0230, 2V(Calc)=74, 2V(Meas)=75.93.  Dispersion none.	Mirabilite 
Biaxial (+), a=1.4, b=1.499, g=1.667, bire=0.2670, 2V(Calc)=84, 2V(Meas)=83.	Wheatleyite 
Biaxial (-), a=1.405, b=1.425, g=1.44, bire=0.0350, 2V(Calc)=80, 2V(Meas)=71.  Dispersion r > v.	Natron 
Biaxial (-), a=1.4072, b=1.4136, g=1.415, bire=0.0078	Thomsenolite 
Biaxial (-), a=1.41, b=1.535, g=1.543, bire=0.1330, 2V(Calc)=26, 2V(Meas)=28.	Natrite 
Biaxial (+), a=1.411, b=1.416, g=1.422, bire=0.0110, 2V(Calc)=86, 2V(Meas)=77.	Carlhintzeite 
Biaxial (+), a=1.411, b=1.413, g=1.42, bire=0.0090	Pachnolite 
Biaxial (-), a=1.412, b=1.501, g=1.526, bire=0.1140	Nesquehonite 
Biaxial (-), a=1.412, b=1.492, g=1.54, bire=0.1280, 2V(Calc)=70, 2V(Meas)=72.  Dispersion relatively strong.	Trona 
Biaxial (-), a=1.413, b=1.416-1.417, g=1.423, bire=0.0100, 2V(Calc)=68-80, 2V(Meas)=74.	Yaroslavite 
Biaxial (-), a=1.415, b=1.524, g=1.592, bire=0.1770	Natroxalate !
Biaxial (?), a=1.418, g=1.448,  bire=0.0300	Meridianiite !
Biaxial (-), a=1.42, b=1.506, g=1.524, bire=0.1040, 2V(Calc)=46, 2V(Meas)=48.	Thermonatrite 
Biaxial (+), a=1.422, b=1.435, g=1.48, bire=0.0580	Santite 
Biaxial (-), a=1.4227, b=1.5358, g=1.5545, bire=0.1318, 2V(Calc)=40, 2V(Meas)=41.633.	Teschemacherite 
Biaxial (-), a=1.423, b=1.439, g=1.444, bire=0.0210, 2V(Calc)=56, 2V(Meas)=small.	Svyazhinite 
Biaxial (+), a=1.424, b=1.432, g=1.4415, bire=0.0175, 2V(Calc)=86, 2V(Meas)=94-94.5.	Karasugite 
Biaxial (-), a=1.424, b=1.55, g=1.65, bire=0.2260, 2V(Calc)=76, 2V(Meas)=80.  Dispersion r > v very weak.	Lindbergite !
Biaxial (-), a=1.424, b=1.436, g=1.438, bire=0.0140, 2V(Calc)=44, 2V(Meas)=48.  Dispersion not discernible.	Wilcoxite 
Biaxial (+), a=1.425, b=1.428, g=1.432, bire=0.0070, 2V(Calc)=82, 2V(Meas)=72.	Calcjarlite 
Biaxial (-), a=1.426, b=1.453, g=1.456, bire=0.0300, 2V(Calc)=36, 2V(Meas)=38.  Dispersion none.	Hexahydrite 
Biaxial (-), a=1.4285, b=1.5672, g=1.5743, bire=0.1458, 2V(Calc)=22, 2V(Meas)=25.	Zabuyelite 
Biaxial (-), a=1.429, b=1.528, g=1.538, bire=0.1090	Ameghinite 
Biaxial (+/-), a=1.429, b=1.433, g=1.436, bire=0.0070, 2V(Calc)=80, 2V(Meas)=90.	Jarlite 
Biaxial (-), a=1.43, b=1.454, g=1.47, bire=0.0400	IMA2002-034 !
Biaxial (-), a=1.43, b=1.452, g=1.485, bire=0.0550, 2V(Calc)=82, 2V(Meas)=52.  Dispersion none.	Kalinite 
Biaxial (-), a=1.43, b=1.46, g=1.48, bire=0.0500, 2V(Calc)=76, 2V(Meas)=86.	Matteuccite 
Biaxial (+), a=1.431, b=1.438, g=1.507, bire=0.0760, 2V(Calc)=38, 2V(Meas)=35.	Sborgite 
Biaxial (-), a=1.432, b=1.47, g=1.492, bire=0.0600, 2V(Calc)=72, 2V(Meas)=73.  Dispersion weak, r > v.	Deliensite !
Biaxial (-), a=1.433, b=1.436, g=1.4389, bire=0.0059, 2V(Calc)=88, 2V(Meas)=87.	Bogvadite 
Biaxial (-), a=1.433, b=1.455, g=1.461, bire=0.0280, 2V(Calc)=54, 2V(Meas)=52.  Dispersion none.	Epsomite 
Biaxial (-), a=1.433, b=1.519, g=1.528, bire=0.0950, 2V(Calc)=34, 2V(Meas)=32.4.	Wegscheiderite 
Biaxial (-), a=1.435, b=1.455, g=1.459, bire=0.0240, 2V(Calc)=46, 2V(Meas)=48.  Dispersion dispersion not observed.	Wattevilleite 
Biaxial (-), a=1.436, b=1.442, g=1.442, bire=0.0060	Jorgensenite !
Biaxial (-), a=1.438, b=1.547, g=1.595, bire=0.1570, 2V(Calc)=62, 2V(Meas)=62.	Oxammite 
Biaxial (+), a=1.439, b=1.439, g=1.442, bire=0.0030	Kogarkoite 
Biaxial (+), a=1.439, b=1.442, g=1.469, bire=0.0300, 2V(Calc)=38, 2V(Meas)=35.567.	Stercorite 
Biaxial (-), a=1.44, b=1.46, g=1.487, bire=0.0470, 2V(Calc)=84, 2V(Meas)=68.	Khademite 
Biaxial (-), a=1.44, b=1.454, g=1.455, bire=0.0150, 2V(Calc)=28, 2V(Meas)=29.74.	Lecontite 
Biaxial (+), a=1.441, b=1.442, g=1.444, bire=0.0030, 2V(Calc)=72, 2V(Meas)=70.	Usovite 
Biaxial (-), a=1.442, g=1.504,  bire=0.0620	Admontite 
Biaxial (-), a=1.443, b=1.457, g=1.458, bire=0.0150, 2V(Calc)=28, 2V(Meas)=29.6.  Dispersion r > v strong.	Catalanoite !
Biaxial (-), a=1.444, b=1.5155, g=1.523, bire=0.0790, 2V(Calc)=34, 2V(Meas)=34.  Dispersion relatively strong.	Gaylussite 
Biaxial (-), a=1.445, b=1.485, g=1.49, bire=0.0450, 2V(Calc)=38, 2V(Meas)=15.	Hungchaoite 
Biaxial (+), a=1.445, b=1.46, g=1.491, bire=0.0460, 2V(Calc)=72, 2V(Meas)=56.	Mercallite 
Biaxial (?), b=1.445	Thermessaite !
Biaxial (-), a=1.447, b=1.469-1.47, g=1.472, bire=0.0250, 2V(Calc)=32-40, 2V(Meas)=39-40.  Dispersion r > v distinct.	Borax 
Biaxial (-), a=1.448, b=1.489, g=1.493, bire=0.0450, 2V(Calc)=32, 2V(Meas)=34.  Dispersion r > v distinct.	Burkeite 
Biaxial (-), a=1.448, b=1.641, g=1.642, bire=0.1940, 2V(Calc)=6, 2V(Meas)=5.  Dispersion Calculated α index.	Ferrosaponite !
Biaxial (-), a=1.448, b=1.454, g=1.456, bire=0.0080	Gearksutite 
Biaxial (+), a=1.449, b=1.453, g=1.458, bire=0.0090	Chesnokovite !
Biaxial (-), a=1.449, b=1.461, g=1.463, bire=0.0140, 2V(Calc)=44, 2V(Meas)=56.	Mendozite 
Biaxial (+), a=1.4507, b=1.4528, g=1.4624-1.4627, bire=0.0117-0.0120, 2V(Calc)=50-52, 2V(Meas)=46-57.	Acuminite 
Biaxial (-), a=1.451, b=1.47, g=1.478, bire=0.0270, 2V(Calc)=64, 2V(Meas)=46.	Kanemite 
Biaxial (-), a=1.452, b=1.527, g=1.538, bire=0.0860, 2V(Calc)=40, 2V(Meas)=43.	Stenonite 
Biaxial (-), a=1.452, b=1.456, g=1.458, bire=0.0060, 2V(Calc)=70, 2V(Meas)=70.	Tikhonenkovite 
Biaxial (-), a=1.453, b=1.459, 	Kanonerovite !
Biaxial (-), a=1.453-1.455, b=1.49-1.492, g=1.498-1.502, bire=0.0450-0.0470	Bayleyite 
Biaxial (+), a=1.454, b=1.461, g=1.471, bire=0.0170, 2V(Calc)=82, 2V(Meas)=65.  Dispersion very weak, r > v.	Dorfmanite 
Biaxial (-), a=1.454, b=1.472, g=1.488, bire=0.0340, 2V(Calc)=84, 2V(Meas)=80.  Dispersion r > v distinct.	Kernite 
Biaxial (-), a=1.447-1.463, b=1.475-1.48, g=1.47-1.485, bire=0.0220-0.0230, 2V(Meas)=46.  Dispersion none.	Goslarite 
Biaxial (-), a=1.455, b=1.503, g=1.549, bire=0.0940, 2V(Calc)=86, 2V(Meas)=85.	Hellyerite 
Biaxial (-), a=1.455, b=1.538, g=1.545, bire=0.0900, 2V(Calc)=30, 2V(Meas)=45.  Dispersion distinct.	Ikaite 
Biaxial (+), a=1.455, b=1.485, g=1.528, bire=0.0730, 2V(Calc)=82, 2V(Meas)=85.  Dispersion medium, r > v.	Zugshunstite-(Ce) !
Biaxial (+), a=1.456, b=1.46, g=1.48, bire=0.0240, 2V(Calc)=50, 2V(Meas)=47.	Chessexite 
Biaxial (?), a=1.457, g=1.506,  bire=0.0490	Chvaleticeite 
Biaxial (-), a=1.457, b=1.543, g=1.622, bire=0.1650, 2V(Calc)=82, 2V(Meas)=82.  Dispersion none.	Horvathite-(Y) !
Biaxial (+), a=1.458, b=1.473, g=1.501, bire=0.0430, 2V(Calc)=74, 2V(Meas)=73.7.	Barringtonite 
Biaxial (-), a=1.458, b=1.527, g=1.599, bire=0.1410, 2V(Calc)=86, 2V(Meas)=90.  Dispersion none.	Gwihabaite !
Biaxial (+), a=1.459, b=1.464, g=1.47, bire=0.0110, 2V(Calc)=86, 2V(Meas)=90.  Dispersion none.	Aluminite 
Biaxial (-), a=1.459, b=1.47, g=1.47, bire=0.0110	Cattiite !
Biaxial (-), a=1.459, b=1.473, g=1.483, bire=0.0240, 2V(Calc)=78, 2V(Meas)=80.	Jurbanite 
Biaxial (-), a=1.46, b=1.478, g=1.481, bire=0.0210, 2V(Calc)=44, 2V(Meas)=44.  Dispersion r > v strong.	Megacyclite 
Biaxial (+), a=1.4607, b=1.4629, g=1.4755, bire=0.0148, 2V(Calc)=46, 2V(Meas)=47.9.	Picromerite 
Biaxial (-), a=1.461, b=1.478, g=1.485, bire=0.0240	Creedite 
Biaxial (+), a=1.461, b=1.47, g=1.484, bire=0.0230	Rostite 
Biaxial (+), a=1.462, b=1.465, g=1.469, bire=0.0070, 2V(Calc)=82, 2V(Meas)=79.8.  Dispersion r > v weak.	Alpersite !
Biaxial (-), a=1.462, b=1.482, g=1.495, bire=0.0330, 2V(Calc)=76, 2V(Meas)=71.	Aubertite 
Biaxial (+), a=1.462, b=1.466, g=1.469, bire=0.0070, 2V(Calc)=80, 2V(Meas)=78-80.	Boggildite 
Biaxial (+), a=1.462, b=1.465, g=1.474, bire=0.0120	Mallardite 
Biaxial (-), a=1.462, b=1.482, g=1.49, bire=0.0280, 2V(Calc)=62, 2V(Meas)=65.	Moraesite 
Biaxial (+), a=1.464, b=1.468, g=1.474, bire=0.0100, 2V(Calc)=80, 2V(Meas)=74.	Konyaite 
Biaxial (-), a=1.465, b=1.485, g=1.535, bire=0.0700, 2V(Calc)=68, 2V(Meas)=64.	Baylissite 
Biaxial (-), a=1.465, b=1.494, g=1.495, bire=0.0300, 2V(Calc)=20, 2V(Meas)=10.	Bianchite 
Biaxial (+), a=1.465, b=1.486, g=1.516, bire=0.0510	Dashkovaite !
Biaxial (+), a=1.465, b=1.468, g=1.507, bire=0.0420	Lansfordite 
Biaxial (-), a=1.465, b=1.498, g=1.504, bire=0.0390	Nitrocalcite 
Biaxial (-), a=1.465, b=1.473, g=1.477, bire=0.0120, 2V(Calc)=70, 2V(Meas)=15.	Sasaite 
Biaxial (-), a=1.465, b=1.51, g=1.54, bire=0.0750	Swartzite 
Biaxial (-), a=1.466, b=1.542, g=1.596, bire=0.1300, 2V(Calc)=76, 2V(Meas)=77.  Dispersion relatively weak.	Dawsonite 
Biaxial (-), a=1.466, b=1.481, g=1.4875, bire=0.0215, 2V(Calc)=66, 2V(Meas)=112-114.	Magnesioaubertite 
Biaxial (?), b=1.466	Silhydrite 
Biaxial (+), a=1.467, b=1.4755, g=1.494, bire=0.0270, 2V(Calc)=70, 2V(Meas)=70.  Dispersion none.	Carnallite 
Biaxial (-), a=1.467, b=1.489, g=1.492, bire=0.0250, 2V(Calc)=40, 2V(Meas)=42.  Dispersion r > v weak.	Morenosite 
Biaxial (+), a=1.468, b=1.484, g=1.515, bire=0.0470, 2V(Calc)=74, 2V(Meas)=80.	Calclacite 
Biaxial (-), a=1.468, b=1.507, g=1.529, bire=0.0610, 2V(Calc)=72, 2V(Meas)=73.5.	Ezcurrite 
Biaxial (?), a=1.468, g=1.498,  bire=0.0300	Ferrohexahydrite 
Biaxial (+), a=1.469, b=1.473, g=1.491, bire=0.0220	Meta-alunogen 
Biaxial (-), a=1.469, b=1.482, g=1.49, bire=0.0210, 2V(Calc)=74, 2V(Meas)=75.	Revdite 
Biaxial (?), a=1.469-1.47, g=1.493-1.494,  bire=0.0240	Nickelhexahydrite 
Biaxial (+), a=1.47, b=1.487, g=1.54, bire=0.0700, 2V(Calc)=62, 2V(Meas)=60.	Ammonioborite 
Biaxial (-), a=1.47, b=1.48, g=1.49, bire=0.0200	Boothite 
Biaxial (?), a=1.47	Magadiite 
Biaxial (-), a=1.47, b=1.497, g=1.497, bire=0.0270	Moorhouseite 
Biaxial (+), a=1.47, b=1.481, g=1.497, bire=0.0270, 2V(Calc)=82, 2V(Meas)=80.	Rivadavite 
Biaxial (+/-), a=1.47, b=1.51, g=1.579, bire=0.1090, 2V(Calc)=78, 2V(Meas)=85.	Strontioborite 
Biaxial (-), a=1.47, b=1.477, g=1.482, bire=0.0120	Vashegyite 
Biaxial (+), a=1.47-1.471, b=1.4765-1.4795, g=1.486, bire=0.0150-0.0160, 2V(Calc)=80, 2V(Meas)=86.  Dispersion none.	Melanterite 
Biaxial (+), a=1.471, b=1.477, g=1.484, bire=0.0130, 2V(Calc)=86, 2V(Meas)=83.  Dispersion none.	Thenardite 
Biaxial (+), a=1.4716, b=1.473, g=1.4786, bire=0.0070	Boussingaultite 
Biaxial (-), a=1.472, b=1.503, g=1.526, bire=0.0540, 2V(Calc)=78, 2V(Meas)=80.	Aksaite 
Biaxial (-), a=1.472, b=1.562, g=1.569, bire=0.0970, 2V(Calc)=28, 2V(Meas)=25-30.	Rouvilleite 
Biaxial (+), a=1.473, b=1.474, g=1.48, bire=0.0070, 2V(Calc)=46, 2V(Meas)=31-69.  Dispersion none.	Alunogen 
Biaxial (-), a=1.473, b=1.492, g=1.502, bire=0.0290, 2V(Calc)=70, 2V(Meas)=69.	Para-alumohydrocalcite 
Biaxial (+), a=1.472-1.475, b=1.48, g=1.487-1.49, bire=0.0150	Makatite 
Biaxial (?), a=1.475, b=1.495, g=1.508, bire=0.0330, 2V(Calc)=76, 2V(Meas)=77.	Chelyabinskite *
Biaxial (+), a=1.475, b=1.48, g=1.488, bire=0.0130, 2V(Calc)=78, 2V(Meas)=70.	Dietrichite 
Biaxial (+), a=1.475, b=1.48, g=1.487, bire=0.0120, 2V(Calc)=82, 2V(Meas)=81.	Misenite 
Biaxial (-), a=1.471-1.48, b=1.475-1.481, g=1.476-1.485, bire=0.0050, 2V(Calc)=52-54, 2V(Meas)=52-92.  Dispersion r < v moderate.	Dachiardite-Na 
Biaxial (+), a=1.4756, b=1.4775, g=1.4805, bire=0.0049	Caichengyunite !
Biaxial (-), a=1.476, b=1.48, g=1.483, bire=0.0070, 2V(Calc)=80, 2V(Meas)=60.  Dispersion none.	Pickeringite 
Biaxial (+), a=1.476, b=1.478, g=1.483, bire=0.0070	Terranovaite !
Biaxial (-), a=1.476, b=1.479, g=1.481, bire=0.0050	Tveitite-(Y) 
Biaxial (+), a=1.476, g=1.5,  bire=0.0240	Uklonskovite 
Biaxial (+), a=1.471-1.482, b=1.472-1.483, g=1.474-1.488, bire=0.0030-0.0060, 2V(Calc)=50-72, 2V(Meas)=36-90.  Dispersion none.	Tridymite 
Biaxial (-), a=1.477, b=1.483, g=1.489, bire=0.0120, 2V(Calc)=88, 2V(Meas)=88.	Bieberite 
Biaxial (-), a=1.477, b=1.485, g=1.486, bire=0.0090, 2V(Calc)=38, 2V(Meas)=38.33.	Phosphorrosslerite 
Biaxial (?), a=1.477, g=1.484,  bire=0.0070	Wupatkiite 
Biaxial (+/-), a=1.472-1.483, b=1.475-1.485, g=1.477-1.487, bire=0.0040-0.0050, 2V(Calc)=78-88, 2V(Meas)=76-104.  Dispersion none.	Mordenite 
Biaxial (-), a=1.478, b=1.482, g=1.482, bire=0.0040, 2V(Calc)=0, 2V(Meas)=0-15.  Dispersion none.	Apjohnite 
Biaxial (+), a=1.477-1.479, b=1.483-1.487, g=1.488-1.489, bire=0.0100-0.0110	Zincmelanterite 
Biaxial (+), a=1.479, b=1.482, g=1.487, bire=0.0080, 2V(Calc)=76, 2V(Meas)=90.	Leonite 
Biaxial (-), a=1.4791, b=1.4851, g=1.4891, bire=0.0100, 2V(Calc)=78, 2V(Meas)=78.	Barrerite 
Biaxial (+), a=1.48, b=1.498, g=1.571, bire=0.0910	Adamsite-(Y) !
Biaxial (-), a=1.48, b=1.481, g=1.487, bire=0.0070, 2V(Calc)=46, 2V(Meas)=25.	Boggsite 
Biaxial (-), a=1.48, b=1.485, g=1.486, bire=0.0060	Gottardiite !
Biaxial (-), a=1.48, b=1.486, g=1.49, bire=0.0100, 2V(Calc)=78, 2V(Meas)=35.  Dispersion none.	Halotrichite 
Biaxial (+), a=1.48, 2V(Meas)=small.	Kenyaite 
Biaxial (+), a=1.48, b=1.49, g=1.55, bire=0.0700, 2V(Calc)=46, 2V(Meas)=7.  Dispersion none.	Levinsonite-(Y) !
Biaxial (+/-), a=1.473-1.489, b=1.474-1.489, g=1.477-1.492, bire=0.0030-0.0040	Ferrierite-K !
Biaxial (+/-), a=1.473-1.489, b=1.474-1.489, g=1.477-1.492, bire=0.0030-0.0040	Ferrierite-Mg 
Biaxial (+/-), a=1.473-1.489, b=1.474-1.489, g=1.477-1.492, bire=0.0030-0.0040	Ferrierite-Na !
Biaxial (+), a=1.473-1.489, b=1.476-1.491, g=1.485-1.502, bire=0.0120-0.0130, 2V(Calc)=48-62, 2V(Meas)=60-63.  Dispersion weak, r < v.	Natrolite 
Biaxial (+/-), a=1.478-1.485, b=1.48-1.4895, g=1.48-1.49, bire=0.0020-0.0050, 2V(Calc)=0-36, 2V(Meas)=0-32.  Dispersion none.	Chabazite-Ca 
Biaxial (+/-), a=1.478-1.485, b=1.48-1.4895, g=1.48-1.49, bire=0.0020-0.0050, 2V(Calc)=0-36, 2V(Meas)=0-32.  Dispersion none.	Chabazite-K !
Biaxial (+/-), a=1.478-1.485, b=1.48-1.4895, g=1.48-1.49, bire=0.0020-0.0050, 2V(Calc)=0-36, 2V(Meas)=0-32.  Dispersion none.	Chabazite-Na !
Biaxial (+), a=1.473-1.49, b=1.49-1.496, g=1.506-1.511, bire=0.0210-0.0330	Fluellite 
Biaxial (-), a=1.482, b=1.512, g=1.53, bire=0.0480, 2V(Calc)=74, 2V(Meas)=77.	Inderborite 
Biaxial (-), a=1.482, b=1.492, g=1.493, bire=0.0110, 2V(Calc)=34, 2V(Meas)=45.13.	Pentahydrite 
Biaxial (-), a=1.483, b=1.486, g=1.487, bire=0.0040, 2V(Calc)=58, 2V(Meas)=71.  Dispersion relatively strong.	Blodite 
Biaxial (-), a=1.483, b=1.516, g=1.533, bire=0.0500	Caoxite !
Biaxial (+), a=1.483, b=1.53, g=1.576, bire=0.0930, 2V(Calc)=86, 2V(Meas)=70.	Chalconatronite 
Biaxial (?), a=1.483, b=1.483, g=1.483, bire=0.0000	Direnzoite !
Biaxial (+), a=1.48-1.486, g=1.486-1.497,  bire=0.0060-0.0110, 2V(Meas)=75.	Mohrite 
Biaxial (?), a=1.483, g=1.488,  bire=0.0050	Perlialite 
Biaxial (+/-), a=1.476-1.491, b=1.479-1.493, g=1.479-1.497, bire=0.0030-0.0060, 2V(Calc)=0-72, 2V(Meas)=31-48.  Dispersion r > v to r < v strong.	Clinoptilolite-Ca !
Biaxial (+/-), a=1.476-1.491, b=1.479-1.493, g=1.479-1.497, bire=0.0030-0.0060, 2V(Calc)=0-72, 2V(Meas)=31-48.  Dispersion r > v to r < v strong.	Clinoptilolite-K 
Biaxial (+/-), a=1.476-1.491, b=1.479-1.493, g=1.479-1.497, bire=0.0030-0.0060, 2V(Calc)=0-72, 2V(Meas)=31-48.  Dispersion r > v to r < v strong.	Clinoptilolite-Na !
Biaxial (+), a=1.4836, b=1.4864, g=1.502, bire=0.0184, 2V(Calc)=48, 2V(Meas)=46.533.	Cyanochroite 
Biaxial (+), a=1.484, b=1.498, g=1.523, bire=0.0390, 2V(Calc)=76, 2V(Meas)=70.	Aristarainite 
Biaxial (+), a=1.484, b=1.501, g=1.55, bire=0.0660	Gowerite 
Biaxial (?), b=1.484	Kribergite 
Biaxial (?), a=1.484, g=1.499,  bire=0.0150	Sanjuanite 
Biaxial (+), a=1.484, b=1.486, g=1.497, bire=0.0130, 2V(Calc)=48, 2V(Meas)=60.	Tamarugite 
Biaxial (-), a=1.479-1.49, b=1.51-1.525, g=1.511-1.527, bire=0.0320-0.0370, 2V(Calc)=20-26, 2V(Meas)=0-10.  Dispersion none.	Saponite 
Biaxial (-), a=1.4848, b=1.4864-1.4964, g=1.4979, bire=0.0131	Stellerite 
Biaxial (+), a=1.485, b=1.494, g=1.505, bire=0.0200, 2V(Calc)=86, 2V(Meas)=large.	Canavesite 
Biaxial (-), a=1.485, b=1.565, g=1.572, bire=0.0870	Griffithite *
Biaxial (-), a=1.485, b=1.487, g=1.488, bire=0.0030, 2V(Calc)=70, 2V(Meas)=70.  Dispersion 2V could not be measured.	Mutinaite !
Biaxial (-), a=1.479-1.492, b=1.485-1.5, g=1.489-1.505, bire=0.0100-0.0130, 2V(Calc)=76-78, 2V(Meas)=22-79.  Dispersion weak, r < v.	Stilbite-Ca 
Biaxial (-), a=1.479-1.492, b=1.485-1.5, g=1.489-1.505, bire=0.0100-0.0130, 2V(Calc)=76-78, 2V(Meas)=22-79.  Dispersion weak, r < v.	Stilbite-Na !
Biaxial (?), a=1.479-1.493, g=1.48-1.494,  bire=0.0010	Analcime 
Biaxial (-), a=1.488, g=1.5,  bire=0.0120	Hydroglauberite 
Biaxial (+), a=1.488, b=1.491, g=1.505, bire=0.0170, 2V(Calc)=52, 2V(Meas)=37.	Inderite 
Biaxial (-), a=1.488, b=1.508, g=1.515, bire=0.0270, 2V(Calc)=60, 2V(Meas)=63.  Dispersion r > v.	Kurnakovite 
Biaxial (-), a=1.488, b=1.489, g=1.489, bire=0.0010, 2V(Calc)=0, 2V(Meas)=84.  Dispersion r < v weak.	Vanthoffite 
Biaxial (-), a=1.488-1.489, b=1.533-1.534, g=1.556-1.557, bire=0.0680, 2V(Calc)=68, 2V(Meas)=71.  Dispersion none.	Artinite 
Biaxial (-), a=1.489, b=1.489, g=1.494, bire=0.0050, 2V(Calc)=0, 2V(Meas)=0.	Gobbinsite 
Biaxial (-), a=1.49, b=1.502, g=1.502, bire=0.0120	Bearsite 
Biaxial (-), a=1.49, g=1.56,  bire=0.0700	Bradleyite 
Biaxial (-), a=1.49, b=1.5, g=1.52, bire=0.0300	Hectorite 
Biaxial (?), a=1.49, g=1.505,  bire=0.0150	Nahpoite 
Biaxial (+), a=1.49, b=1.494, g=1.501, bire=0.0110	Nickelboussingaultite 
Biaxial (+), a=1.49, b=1.491, g=1.497, bire=0.0070, 2V(Calc)=46, 2V(Meas)=50.	Starkeyite 
Biaxial (+), a=1.49, b=1.493, 	Struvite-(K) !
Biaxial (+), a=1.49, b=1.51, g=1.52, bire=0.0300, 2V(Calc)=68, 2V(Meas)=73-78.  Dispersion none.	Ulexite 
Biaxial (+), a=1.49, b=1.555, g=1.65, bire=0.1600, 2V(Calc)=84, 2V(Meas)=80.  Dispersion none.	Whewellite 
Biaxial (+), a=1.488-1.494, b=1.49-1.496, g=1.494-1.499, bire=0.0050-0.0060, 2V(Calc)=72-80, 2V(Meas)=58-73.  Dispersion r > v strong.	Dachiardite-Ca 
Biaxial (+), a=1.476-1.506, b=1.479-1.51, g=1.479-1.517, bire=0.0030-0.0110, 2V(Calc)=0-76, 2V(Meas)=10-48.  Dispersion r > v.	Heulandite-Ca 
Biaxial (+), a=1.476-1.506, b=1.479-1.51, g=1.479-1.517, bire=0.0030-0.0110, 2V(Calc)=0-76, 2V(Meas)=10-48.  Dispersion r > v.	Heulandite-K !
Biaxial (+), a=1.476-1.506, b=1.479-1.51, g=1.479-1.517, bire=0.0030-0.0110, 2V(Calc)=0-76, 2V(Meas)=10-48.  Dispersion r > v.	Heulandite-Na !
Biaxial (+), a=1.476-1.506, b=1.479-1.51, g=1.479-1.517, bire=0.0030-0.0110, 2V(Calc)=0-76, 2V(Meas)=10-48.  Dispersion r > v.	Heulandite-Sr !
Biaxial (?), a=1.492, g=1.496,  bire=0.0040	Eugsterite 
Biaxial (-), a=1.492, b=1.524, g=1.526, bire=0.0340, 2V(Calc)=26, 2V(Meas)=29-45.	Swinefordite 
Biaxial (-), a=1.492, b=1.511, g=1.521, bire=0.0290, 2V(Calc)=70, 2V(Meas)=69.	Uranospathite 
Biaxial (-), a=1.493, b=1.521, g=1.523, bire=0.0300, 2V(Calc)=28, 2V(Meas)=26.	Hectorfloresite 
Biaxial (-), a=1.485-1.502, b=1.553-1.562, g=1.57-1.585, bire=0.0830-0.0850, 2V(Calc)=50-60, 2V(Meas)=64.	Alumohydrocalcite 
Biaxial (+), a=1.4935, b=1.4947, g=1.4973, bire=0.0038, 2V(Calc)=70, 2V(Meas)=67.	Arcanite 
Biaxial (+), a=1.494, b=1.507, g=1.523, bire=0.0290, 2V(Calc)=86, 2V(Meas)=85.  Dispersion weak, r > v.	Grumantite 
Biaxial (+), a=1.494, b=1.561, g=1.692, bire=0.1980	Humboldtine 
Biaxial (-), a=1.494, b=1.505, g=1.516, bire=0.0220, 2V(Calc)=88, 2V(Meas)=90.	Kainite 
Biaxial (-), a=1.494, b=1.512, g=1.524, bire=0.0300, 2V(Calc)=76, 2V(Meas)=66.8.	Nasinite 
Biaxial (+/-), a=1.483-1.505, b=1.484-1.511, g=1.486-1.514, bire=0.0030-0.0090, 2V(Calc)=70-72, 2V(Meas)=60-90.  Dispersion r > v or r < v.	Phillipsite-Ca !
Biaxial (+/-), a=1.483-1.505, b=1.484-1.511, g=1.486-1.514, bire=0.0030-0.0090, 2V(Calc)=70-72, 2V(Meas)=60-90.  Dispersion r > v or r < v.	Phillipsite-K !
Biaxial (+/-), a=1.483-1.505, b=1.484-1.511, g=1.486-1.514, bire=0.0030-0.0090, 2V(Calc)=70-72, 2V(Meas)=60-90.  Dispersion r > v or r < v.	Phillipsite-Na 
Biaxial (+), a=1.495, b=1.507, g=1.528, bire=0.0330, 2V(Calc)=76, 2V(Meas)=79.4.	Bischofite 
Biaxial (-), a=1.495, b=1.498, g=1.502, bire=0.0070	Goosecreekite 
Biaxial (-), a=1.495, b=1.505-1.5115, g=1.52, bire=0.0250, 2V(Calc)=70-80, 2V(Meas)=70-84.  Dispersion relatively weak.	Inyoite 
Biaxial (-), a=1.495, b=1.543, g=1.544, bire=0.0490	Schrockingerite 
Biaxial (+), a=1.495, b=1.496, g=1.504, bire=0.0090, 2V(Calc)=40, 2V(Meas)=37.367.	Struvite 
Biaxial (+), a=1.495, b=1.497, g=1.504, bire=0.0090, 2V(Calc)=58, 2V(Meas)=78.	Yugawaralite 
Biaxial (-), a=1.496, b=1.539, g=1.557, bire=0.0610, 2V(Calc)=64, 2V(Meas)=62.7.	Biringuccite 
Biaxial (-), a=1.496, b=1.504, g=1.506, bire=0.0100, 2V(Calc)=52, 2V(Meas)=52.	Canaphite 
Biaxial (+), a=1.497, b=1.502, g=1.539, bire=0.0420, 2V(Calc)=42, 2V(Meas)=40.  Dispersion r > v moderate.	Liebigite 
Biaxial (+), a=1.497, b=1.501, g=1.509, bire=0.0120, 2V(Calc)=72, 2V(Meas)=73.  Dispersion very weak, r > v.	Mereiterite !
Biaxial (-), a=1.497, b=1.512, g=1.513, bire=0.0160	Meta-aluminite 
Biaxial (?), b=1.498	Amicite 
Biaxial (?), a=1.498, g=1.513,  bire=0.0150	Giorgiosite 
Biaxial (+), a=1.498, b=1.503, g=1.51, bire=0.0120, 2V(Calc)=82, 2V(Meas)=83.	Hexahydroborite 
Biaxial (-), a=1.498, b=1.51, g=1.517, bire=0.0190, 2V(Calc)=74, 2V(Meas)=70-80.	Jokokuite 
Biaxial (-), a=1.498, b=1.506, g=1.507, bire=0.0090, 2V(Calc)=38, 2V(Meas)=35.	Montesommaite 
Biaxial (+/-), a=1.498, g=1.502,  bire=0.0040, 2V(Meas)=70-105.	Wairakite 
Biaxial (+), a=1.498, b=1.4981, g=1.499, bire=0.0010, 2V(Calc)=38, 2V(Meas)=moderate.	Zaherite 
Biaxial (-), a=1.494-1.503, b=1.525-1.532, g=1.526-1.533, bire=0.0300-0.0320, 2V(Calc)=20, 2V(Meas)=9-16.  Dispersion none.	Beidellite 
Biaxial (+), a=1.499, b=1.502, g=1.521, bire=0.0220, 2V(Calc)=44, 2V(Meas)=45.	Hydrochlorborite 
Biaxial (-), a=1.499, b=1.5, g=1.501, bire=0.0020, 2V(Calc)=88, 2V(Meas)=56.  Dispersion r > v.	Merlinoite 
Biaxial (-), a=1.499, b=1.507, g=1.511, bire=0.0120	Nabesite !
Biaxial (-), a=1.498-1.501, b=1.554-1.555, g=1.594-1.597, bire=0.0960, 2V(Calc)=76-80, 2V(Meas)=78.	Minguzzite 
Biaxial (?), a=1.5	Aldermanite 
Biaxial (+/-), b=1.5	Bilinite 
Biaxial (+), a=1.5, b=1.505, g=1.525, bire=0.0250, 2V(Calc)=54, 2V(Meas)=60.	Loughlinite 
Biaxial (-), a=1.5, b=1.535, g=1.56, bire=0.0600, 2V(Calc)=78, 2V(Meas)=78.  Dispersion relatively weak.	Meyerhofferite 
Biaxial (+), a=1.5, b=1.52, g=1.554, bire=0.0540, 2V(Calc)=78, 2V(Meas)=76.	Nobleite 
Biaxial (-), a=1.5, b=1.612, g=1.614, bire=0.1140	Podlesnoite !
Biaxial (-), a=1.501, b=1.594, g=1.595, bire=0.0940, 2V(Calc)=10, 2V(Meas)=17.	Hydrodresserite 
Biaxial (+), a=1.501, b=1.519, g=1.755, bire=0.2540	Kladnoite 
Biaxial (-), a=1.501, b=1.516, g=1.525, bire=0.0240, 2V(Calc)=74, 2V(Meas)=75.	Letovicite 
Biaxial (+), a=1.501, b=1.503, g=1.51, bire=0.0090, 2V(Calc)=58, 2V(Meas)=62.75.  Dispersion none.	Prosopite 
Biaxial (+), a=1.501, b=1.503, g=1.535, bire=0.0340, 2V(Calc)=30, 2V(Meas)=small.	Sveite 
Biaxial (-), a=1.501, b=1.5166, g=1.5176, bire=0.0166, 2V(Calc)=28, 2V(Meas)=28.3.  Dispersion relatively strong.	Syngenite 
Biaxial (-), a=1.502, b=1.51, g=1.512, bire=0.0100, 2V(Calc)=52, 2V(Meas)=44.  Dispersion relatively strong.	Epistilbite 
Biaxial (+), a=1.5-1.504, b=1.505-1.51, g=1.513-1.519, bire=0.0130-0.0150, 2V(Calc)=78-80, 2V(Meas)=moderate.	Mountainite 
Biaxial (+), a=1.502, b=1.508, g=1.525, bire=0.0230	Rabbittite 
Biaxial (?), a=1.502, g=1.517,  bire=0.0150	Tertschite 
Biaxial (+), a=1.501-1.504, b=1.506-1.508, g=1.513-1.518, bire=0.0120-0.0140	Rhodesite 
Biaxial (+), a=1.503, b=1.505, g=1.508, bire=0.0050, 2V(Calc)=80, 2V(Meas)=43.  Dispersion none.	Harmotome 
Biaxial (?), a=1.503, g=1.518,  bire=0.0150	Hydrodelhayelite 
Biaxial (+), a=1.504, b=1.504, g=1.553, bire=0.0490	Evenkite 
Biaxial (+), a=1.504, g=1.515,  bire=0.0110	Mitryaevaite !
Biaxial (+), a=1.504, b=1.51, g=1.516, bire=0.0120	Petalite 
Biaxial (+), a=1.504, b=1.508-1.509, g=1.543-1.545, bire=0.0390-0.0410, 2V(Calc)=40-42, 2V(Meas)=32-39.	Ussingite 
Biaxial (+), a=1.5043, b=1.5095, g=1.5751, bire=0.0708, 2V(Calc)=34, 2V(Meas)=31.433.  Dispersion relatively weak.	Pirssonite 
Biaxial (+), a=1.505, b=1.512, g=1.524, bire=0.0190, 2V(Calc)=76, 2V(Meas)=77.	Flagstaffite 
Biaxial (+), a=1.505, b=1.505, g=1.506, bire=0.0010, 2V(Calc)=0, 2V(Meas)=80.  Dispersion strong, r > v.	Mesolite 
Biaxial (+), a=1.505, b=1.519, g=1.533, bire=0.0280, 2V(Calc)=88, 2V(Meas)=large.	Stanleyite 
Biaxial (?), a=1.505, b=1.511, g=1.517, bire=0.0120, 2V(Calc)=88, 2V(Meas)=87.	Willhendersonite 
Biaxial (+), a=1.5056, b=1.5064, g=1.515, bire=0.0094, 2V(Calc)=36, 2V(Meas)=38.  Dispersion r > v distinct.	Heulandite-Ba !
Biaxial (-), a=1.506, b=1.527, g=1.532, bire=0.0260, 2V(Calc)=50, 2V(Meas)=56.  Dispersion none.	Brianroulstonite !
Biaxial (+), a=1.506, b=1.51, g=1.512, bire=0.0060, 2V(Calc)=70, 2V(Meas)=65-70.	Swaknoite 
Biaxial (-), a=1.5069, b=1.5459, g=1.5693, bire=0.0624	Carboborite 
Biaxial (-), a=1.507, b=1.512, g=1.517, bire=0.0100	Changoite !
Biaxial (+), a=1.507, b=1.529, g=1.576, bire=0.0690, 2V(Calc)=72, 2V(Meas)=67.	Magnesiocopiapite 
Biaxial (-), a=1.507, b=1.517, g=1.521, bire=0.0140, 2V(Calc)=64, 2V(Meas)=49-64.	Natrosilite 
Biaxial (?), b=1.5-1.515	Garronite 
Biaxial (+), a=1.508, b=1.51, g=1.516, bire=0.0080	Dypingite 
Biaxial (+), a=1.508, b=1.518, g=1.53, bire=0.0220	Phosphammite 
Biaxial (+), a=1.508, b=1.515, g=1.523, bire=0.0150, 2V(Calc)=88, 2V(Meas)=90.	Schertelite 
Biaxial (+), a=1.508, b=1.525, g=1.586, bire=0.0780, 2V(Calc)=58, 2V(Meas)=58.  Dispersion r > v strong.	Sideronatrite 
Biaxial (+), a=1.508, b=1.511, g=1.517, bire=0.0090, 2V(Calc)=72, 2V(Meas)=76.2.  Dispersion none.	Wooldridgeite !
Biaxial (+), a=1.5081, b=1.5255, g=1.55, bire=0.0419, 2V(Calc)=82, 2V(Meas)=80.633.	Kaliborite 
Biaxial (-), a=1.505-1.513, b=1.509-1.516, g=1.509-1.518, bire=0.0040-0.0050	Cowlesite 
Biaxial (+), a=1.509, b=1.52, g=1.561, bire=0.0520, 2V(Calc)=56, 2V(Meas)=64.	Larderellite 
Biaxial (?), b=1.509	Scarbroite 
Biaxial (-), a=1.51, b=1.56, g=1.58, bire=0.0700, 2V(Calc)=62, 2V(Meas)=63.	Aerinite 
Biaxial (-), a=1.51, b=1.521, g=1.523, bire=0.0130	Bikitaite 
Biaxial (+), a=1.51, b=1.512, g=1.523, bire=0.0130	Brewsterite-Sr 
Biaxial (-), a=1.51, b=1.528, g=1.531, bire=0.0210, 2V(Calc)=44, 2V(Meas)=36.  Dispersion r > v strong.	Calcioaravaipaite !
Biaxial (+), a=1.51, b=1.513, g=1.527, bire=0.0170, 2V(Calc)=52, 2V(Meas)=47.	Lithosite 
Biaxial (+), a=1.51, b=1.513, g=1.517, bire=0.0070	Monteregianite-(Y) 
Biaxial (-), a=1.485-1.535, b=1.504-1.55, g=1.505-1.55, bire=0.0150-0.0200, 2V(Calc)=0-24, 2V(Meas)=5-30.  Dispersion none.	Montmorillonite 
Biaxial (+), a=1.51, b=1.51, g=1.512, bire=0.0020, 2V(Calc)=0, 2V(Meas)=46.	Olympite 
Biaxial (?), b=1.51	Peisleyite 
Biaxial (-), a=1.507-1.513, b=1.516-1.52, g=1.517-1.521, bire=0.0080-0.0100, 2V(Calc)=36-40, 2V(Meas)=36-56.  Dispersion relatively strong.	Scolecite 
Biaxial (+), a=1.51, b=1.51, g=1.545, bire=0.0350	Solongoite 
Biaxial (-), a=1.51, b=1.583, g=1.595, bire=0.0850, 2V(Calc)=42, 2V(Meas)=42.5.	Strontiodresserite 
Biaxial (-), a=1.502-1.519, b=1.512-1.525, g=1.513-1.526, bire=0.0070-0.0110, 2V(Calc)=34-44, 2V(Meas)=25-47.  Dispersion marked to extreme, r < v.	Laumontite 
Biaxial (-), a=1.507-1.515, b=1.527-1.535, g=1.529-1.536, bire=0.0210-0.0220, 2V(Calc)=24-34, 2V(Meas)=0-7.  Dispersion strong, r > v.	Glauberite 
Biaxial (-), a=1.511, b=1.519, g=1.521, bire=0.0100	Ilesite 
Biaxial (-), a=1.511, b=1.533, g=1.534, bire=0.0230, 2V(Calc)=22, 2V(Meas)=29.	Nyerereite 
Biaxial (-), a=1.511, b=1.529, g=1.544, bire=0.0330, 2V(Calc)=82, 2V(Meas)=84.  Dispersion r < v.	Sinkankasite 
Biaxial (-), a=1.51-1.512, b=1.525-1.526, g=1.533-1.536, bire=0.0230-0.0240	Uralolite 
Biaxial (-), a=1.511-1.5111, b=1.56, g=1.578, bire=0.0669-0.0670, 2V(Calc)=60, 2V(Meas)=61.	Vantasselite 
Biaxial (+), a=1.51-1.514, b=1.512-1.516, g=1.523-1.528, bire=0.0130-0.0140, 2V(Calc)=46-48, 2V(Meas)=44-45.	Brewsterite-Ba !
Biaxial (+), a=1.512, b=1.524, g=1.577, bire=0.0650, 2V(Calc)=54, 2V(Meas)=53.	Strontioginorite 
Biaxial (+), a=1.513, b=1.516, g=1.518, bire=0.0050, 2V(Calc)=78, 2V(Meas)=90.	Lovdarite 
Biaxial (-), a=1.513, b=1.536, g=1.545, bire=0.0320	Minasragrite 
Biaxial (-), a=1.513, b=1.518, g=1.52, bire=0.0070, 2V(Calc)=64, 2V(Meas)=60-70.	Nickelblodite 
Biaxial (?), a=1.513, b=1.525, g=1.536, bire=0.0230	Sobotkite ?
Biaxial (+), a=1.514, b=1.515, g=1.52, bire=0.0060, 2V(Calc)=50, 2V(Meas)=52.	Gonnardite 
Biaxial (?), b=1.514	Kingite 
Biaxial (+), a=1.514, b=1.517, g=1.533, bire=0.0190, 2V(Calc)=48, 2V(Meas)=45.	Newberyite 
Biaxial (+), a=1.514, b=1.524, g=1.543, bire=0.0290, 2V(Calc)=74, 2V(Meas)=73.  Dispersion relatively weak.	Probertite 
Biaxial (-), a=1.513-1.515, b=1.525-1.526, g=1.534-1.536, bire=0.0210, 2V(Calc)=80-86, 2V(Meas)=50.	Siderotil 
Biaxial (-), a=1.514, b=1.559, g=1.562, bire=0.0480, 2V(Calc)=28, 2V(Meas)=0-22.	Zincsilite 
Biaxial (?), a=1.515, g=1.585,  bire=0.0700	Mbobomkulite 
Biaxial (-), a=1.515, b=1.53, g=1.545, bire=0.0300, 2V(Calc)=88, 2V(Meas)=80-89.	Montroyalite 
Biaxial (+), a=1.515, b=1.516, g=1.518, bire=0.0030, 2V(Calc)=72, 2V(Meas)=64-71.	Silinaite 
Biaxial (-), a=1.516, b=1.598, g=1.621, bire=0.1050, 2V(Calc)=52, 2V(Meas)=30.	Amarantite 
Biaxial (-), a=1.516, b=1.539, g=1.546, bire=0.0300, 2V(Calc)=56, 2V(Meas)=56.  Dispersion none.	Chalcanthite 
Biaxial (-), a=1.516, b=1.538, g=1.547, bire=0.0310, 2V(Calc)=64, 2V(Meas)=62.	Korshunovskite 
Biaxial (+), a=1.516, b=1.518, g=1.531, bire=0.0150, 2V(Calc)=44, 2V(Meas)=45.	Rapidcreekite 
Biaxial (+), a=1.516, b=1.532, g=1.554, bire=0.0380, 2V(Calc)=82, 2V(Meas)=82.2.  Dispersion dispersion not observed.	Walkerite !
Biaxial (+), a=1.517, b=1.524, g=1.577, bire=0.0600, 2V(Calc)=42, 2V(Meas)=42.	Ginorite 
Biaxial (-), a=1.518, g=1.601,  bire=0.0830, 2V(Meas)=30-40.	Dresserite 
Biaxial (+/-), a=1.518, b=1.524, g=1.53, bire=0.0120, 2V(Calc)=88, 2V(Meas)=90.	Macdonaldite 
Biaxial (-), a=1.518, b=1.522, g=1.525, bire=0.0070, 2V(Calc)=80, 2V(Meas)=77-84.  Dispersion relatively weak.	Microcline 
Biaxial (-), a=1.518, b=1.522, g=1.523-1.524, bire=0.0050-0.0060, 2V(Calc)=52-70, 2V(Meas)=65-75.  Dispersion relatively strong.	Orthoclase 
Biaxial (-), a=1.516-1.52, b=1.664-1.667, g=1.666-1.668, bire=0.1480-0.1500, 2V(Calc)=12-8, 2V(Meas)=7.  Dispersion weak, r < v.	Strontianite 
Biaxial (?), a=1.519, b=1.552, g=1.561, bire=0.0420	Balavinskite ?
Biaxial (?), a=1.519, g=1.521,  bire=0.0020	Hotsonite-VI 
Biaxial (?), a=1.519, g=1.521,  bire=0.0020	Hotsonite-VII 
Biaxial (-), a=1.519, b=1.55, g=1.559, bire=0.0400, 2V(Calc)=54, 2V(Meas)=5-20.  Dispersion r > v.	Rectorite 
Biaxial (+), a=1.519, b=1.534, g=1.569, bire=0.0500	Tunellite 
Biaxial (-), a=1.515-1.524, b=1.531-1.533, g=1.535, bire=0.0110-0.0200	Searlesite 
Biaxial (-), a=1.52, b=1.568, g=1.591, bire=0.0710, 2V(Calc)=66, 2V(Meas)=68.	Bonshtedtite 
Biaxial (+), a=1.52, b=1.52, g=1.53, bire=0.0100, 2V(Calc)=0, 2V(Meas)=0-15.  Dispersion relatively strong.	Chalcoalumite 
Biaxial (?), a=1.52, g=1.558,  bire=0.0380	Chelkarite 
Biaxial (?), b=1.52	Chlorocalcite 
Biaxial (-), a=1.52, b=1.564, g=1.565, bire=0.0450, 2V(Calc)=16, 2V(Meas)=20.  Dispersion not discernible.	Crawfordite 
Biaxial (+), a=1.52, b=1.53, g=1.58, bire=0.0600, 2V(Calc)=50, 2V(Meas)=60.	Earlandite 
Biaxial (+), a=1.52, b=1.521, g=1.524, bire=0.0040, 2V(Calc)=62, 2V(Meas)=61.3.  Dispersion weak to moderate, r > v.	Gaultite 
Biaxial (+), a=1.519-1.521, b=1.522-1.523, g=1.529-1.53, bire=0.0090-0.0100, 2V(Calc)=58-68, 2V(Meas)=58.  Dispersion strong, r > v.	Gypsum 
Biaxial (+), a=1.52, b=1.533, g=1.584, bire=0.0640, 2V(Calc)=56, 2V(Meas)=55.	Kieserite 
Biaxial (-), a=1.52, b=1.587, g=1.613, bire=0.0930, 2V(Calc)=60, 2V(Meas)=63.  Dispersion relatively weak.	Lanthanite-(La) 
Biaxial (+), a=1.52, b=1.523, g=1.533, bire=0.0130, 2V(Calc)=58, 2V(Meas)=52.2.	Mascagnite 
Biaxial (?), a=1.52, b=1.524, g=1.527, bire=0.0070	Rubicline !
Biaxial (-), a=1.52, b=1.5202, g=1.53, bire=0.0100, 2V(Calc)=18, 2V(Meas)=20-70.  Dispersion none.	Sepiolite 
Biaxial (+), a=1.52, b=1.52, g=1.53, bire=0.0100, 2V(Calc)=0, 2V(Meas)=5-8.	Weinebeneite 
Biaxial (+), a=1.52, b=1.525, g=1.538, bire=0.0180	Yakovenchukite-(Y) !
Biaxial (+), a=1.511-1.53, b=1.513-1.532, g=1.516-1.545, bire=0.0050-0.0150, 2V(Calc)=44-80, 2V(Meas)=44-75.  Dispersion distinct to strong, r > v.	Thomsonite-Ca 
Biaxial (-), a=1.52-1.522, b=1.54-1.541, g=1.545-1.548, bire=0.0250-0.0260, 2V(Calc)=52-60, 2V(Meas)=63.	Luneburgite 
Biaxial (-), a=1.521, b=1.563, g=1.585, bire=0.0640, 2V(Calc)=70, 2V(Meas)=68.	Sidorenkite 
Biaxial (+), a=1.521, b=1.525-1.53, g=1.545, bire=0.0240	Spadaite 
Biaxial (+), a=1.52-1.523, b=1.534-1.535, g=1.569-1.571, bire=0.0480-0.0490, 2V(Calc)=62-66, 2V(Meas)=60-66.  Dispersion relatively weak.	Hydroboracite 
Biaxial (-), a=1.521-1.522, b=1.542-1.544, g=1.551-1.552, bire=0.0300, 2V(Calc)=60-64, 2V(Meas)=65.	Mundrabillaite 
Biaxial (-), a=1.519-1.524, b=1.57-1.571, g=1.58-1.583, bire=0.0590-0.0610, 2V(Calc)=46-52, 2V(Meas)=45-51.  Dispersion r > v very strong.	Romerite 
Biaxial (-), a=1.518-1.525, b=1.523-1.53, g=1.525-1.531, bire=0.0060-0.0070, 2V(Calc)=48-64, 2V(Meas)=60-0.  Dispersion r < v distinct.	Sanidine 
Biaxial (+), a=1.518-1.525, g=1.53-1.537,  bire=0.0120	Tacharanite 
Biaxial (+), a=1.522, b=1.529, g=1.577, bire=0.0550, 2V(Calc)=44, 2V(Meas)=41.  Dispersion none.	Botryogen 
Biaxial (-), a=1.522, b=1.531, g=1.536, bire=0.0140, 2V(Calc)=72, 2V(Meas)=70.	Boyleite 
Biaxial (-), a=1.522, b=1.53, g=1.531, bire=0.0090, 2V(Calc)=38, 2V(Meas)=32.  Dispersion r < v distinct.	Fedorite 
Biaxial (+), a=1.522, b=1.522, g=1.543, bire=0.0210, 2V(Calc)=0, 2V(Meas)=0-9.	Kvanefjeldite 
Biaxial (-), a=1.522, b=1.528, g=1.529, bire=0.0070, 2V(Calc)=44, 2V(Meas)=48.  Dispersion dispersion not observed.	Lalondeite !
Biaxial (-), a=1.522, b=1.568, g=1.578, bire=0.0560, 2V(Calc)=48, 2V(Meas)=47.	Lishizhenite 
Biaxial (-), a=1.522, b=1.531, g=1.534, bire=0.0120, 2V(Calc)=58, 2V(Meas)=55-59.7.	Mcauslanite 
Biaxial (-), a=1.512-1.532, b=1.514-1.535, g=1.515-1.542, bire=0.0030-0.0100, 2V(Calc)=68-70, 2V(Meas)=60.  Dispersion none.	Okenite 
Biaxial (+), a=1.506-1.54, b=1.528-1.549, g=1.575-1.6, bire=0.0600-0.0690, 2V(Calc)=48-72, 2V(Meas)=45-74.  Dispersion none.	Copiapite 
Biaxial (+), a=1.523, b=1.527, g=1.545, bire=0.0220, 2V(Calc)=52, 2V(Meas)=30-90.  Dispersion none.	Hydromagnesite 
Biaxial (+), a=1.523, b=1.525, g=1.55, bire=0.0270, 2V(Calc)=32, 2V(Meas)=30.  Dispersion not discernible.	Kalifersite !
Biaxial (?), b=1.523	Tinnunculite *
Biaxial (-), a=1.519-1.529, b=1.524-1.534, g=1.527-1.536, bire=0.0070-0.0080, 2V(Calc)=64-74, 2V(Meas)=34-60.  Dispersion r > v.	Anorthoclase 
Biaxial (-), a=1.524, b=1.532, g=1.536, bire=0.0120, 2V(Calc)=70, 2V(Meas)=72.	Koktaite 
Biaxial (?), a=1.524, g=1.531,  bire=0.0070	Lutecite *
Biaxial (-), a=1.524, b=1.528, g=1.536, bire=0.0120, 2V(Calc)=72, 2V(Meas)=65.	Nacaphite 
Biaxial (+), a=1.524, b=1.528, g=1.544, bire=0.0200	Sazhinite-(La) !
Biaxial (-), a=1.525, b=1.684, g=1.686, bire=0.1610, 2V(Calc)=10, 2V(Meas)=15.  Dispersion relatively weak.	Barytocalcite 
Biaxial (-), a=1.525, b=1.59, g=1.593, bire=0.0680, 2V(Calc)=22, 2V(Meas)=26-28.	Brenkite 
Biaxial (?), a=1.525, g=1.545,  bire=0.0200	Mangazeite !
Biaxial (+), a=1.525, b=1.53, g=1.55, bire=0.0250	Rosslerite 
Biaxial (+), a=1.525, b=1.528, g=1.544, bire=0.0190, 2V(Calc)=48, 2V(Meas)=47.	Sazhinite-(Ce) 
Biaxial (-), a=1.526, b=1.671, g=1.672, bire=0.1460, 2V(Calc)=8, 2V(Meas)=6.  Dispersion r > v weak.	Alstonite 
Biaxial (?), a=1.526, b=1.602, g=1.602, bire=0.0760, 2V(Calc)=0, 2V(Meas)=3.	Anthonyite 
Biaxial (?), b=1.526	Moganite !
Biaxial (-), a=1.526, b=1.553, g=1.553, bire=0.0270	Shirokshinite !
Biaxial (+), a=1.526, b=1.528, g=1.551, bire=0.0250, 2V(Calc)=34, 2V(Meas)=33.	Teruggite 
Biaxial (-), a=1.527, b=1.542, g=1.549, bire=0.0220, 2V(Calc)=68, 2V(Meas)=80.  Dispersion r > v very weak.	Kovdorskite 
Biaxial (-), a=1.526-1.528, b=1.536-1.537, g=1.541-1.545, bire=0.0150-0.0170, 2V(Calc)=70-86, 2V(Meas)=90.	Rozenite 
Biaxial (-), a=1.527, b=1.536, g=1.551, bire=0.0240, 2V(Calc)=78, 2V(Meas)=79.6.	Sulfoborite 
Biaxial (+), a=1.52-1.535, b=1.526-1.543, g=1.545-1.561, bire=0.0250-0.0260, 2V(Calc)=60-70, 2V(Meas)=72.  Dispersion none.	Wavellite 
Biaxial (+), a=1.528, b=1.529, g=1.531, bire=0.0030, 2V(Calc)=72, 2V(Meas)=39-49.	Shomiokite-(Y) 
Biaxial (+), a=1.528, b=1.532, g=1.54, bire=0.0120, 2V(Calc)=72, 2V(Meas)=62.  Dispersion weak, r > v.	Thomsonite-Sr !
Biaxial (+), a=1.51-1.5468, b=1.52-1.5533, g=1.543-1.582, bire=0.0330-0.0352, 2V(Calc)=52-68, 2V(Meas)=53-71.	Bobierrite 
Biaxial (+), a=1.529, b=1.535, g=1.585, bire=0.0560, 2V(Calc)=40, 2V(Meas)=45.	Aluminocopiapite 
Biaxial (-), a=1.529, b=1.549, g=1.551, bire=0.0220, 2V(Calc)=34, 2V(Meas)=38.  Dispersion dispersion not observed.	Martinite !
Biaxial (-), a=1.529, b=1.534, g=1.534, bire=0.0050	Orthominasragrite !
Biaxial (-), a=1.529, g=1.531,  bire=0.0020, 2V(Meas)=76.  Dispersion r < v weak.	Tsaregorodtsevite 
Biaxial (-), a=1.529, b=1.676, g=1.677, bire=0.1480, 2V(Calc)=8, 2V(Meas)=16.  Dispersion relatively weak.	Witherite 
Biaxial (-), a=1.529-1.53, b=1.68-1.682, g=1.685-1.686, bire=0.1560, 2V(Calc)=16-18, 2V(Meas)=18-19.  Dispersion weak, r < v.	Aragonite 
Biaxial (-), a=1.504-1.555, b=1.522-1.572, g=1.539-1.579, bire=0.0240-0.0350, 2V(Calc)=64-86, 2V(Meas)=45-90.	Hannayite 
Biaxial (+), a=1.523-1.536, b=1.53-1.539, g=1.596-1.603, bire=0.0670-0.0730, 2V(Calc)=26-38, 2V(Meas)=24-37.	Volkovskite 
Biaxial (-), a=1.53, b=1.557, g=1.558, bire=0.0280	Aspidolite 
Biaxial (+), a=1.53, b=1.531, g=1.534, bire=0.0040	Buddingtonite 
Biaxial (-), a=1.53, b=1.551-1.556, g=1.555-1.559, bire=0.0250-0.0290	Polylithionite 
Biaxial (?), a=1.53, g=1.559,  bire=0.0290	Yofortierite 
Biaxial (+), a=1.528-1.533, b=1.5317-1.53685, g=1.538-1.542, bire=0.0090-0.0100, 2V(Calc)=76-82, 2V(Meas)=45.  Dispersion relatively weak.	Albite 
Biaxial (+), a=1.531, b=1.546, g=1.562, bire=0.0310	Brassite 
Biaxial (?), a=1.531, g=1.645,  bire=0.1140	Cejkaite !
Biaxial (+), a=1.531, b=1.534, g=1.538, bire=0.0070, 2V(Calc)=82, 2V(Meas)=70.	Minyulite 
Biaxial (+), a=1.531, b=1.536, g=1.544, bire=0.0130	Pentahydroborite 
Biaxial (-), a=1.531, b=1.555, g=1.57, bire=0.0390, 2V(Calc)=74, 2V(Meas)=75.  Dispersion r < v moderate.	Shortite 
Biaxial (-), a=1.522-1.54, b=1.553-1.57, g=1.553-1.57, bire=0.0300-0.0310, 2V(Calc)=0, 2V(Meas)=2-5.  Dispersion r > v or r < v.	Tainiolite 
Biaxial (-), a=1.53-1.532, b=1.548-1.549, g=1.559, bire=0.0270-0.0290, 2V(Calc)=74, 2V(Meas)=79.  Dispersion r < v moderate.	Tiettaite 
Biaxial (-), a=1.531, b=1.535, g=1.541, bire=0.0100, 2V(Calc)=80, 2V(Meas)=62.	Vertumnite 
Biaxial (+), a=1.532, b=1.555, g=1.591, bire=0.0590	Amarillite 
Biaxial (?), b=1.528-1.536	Aplowite 
Biaxial (-), a=1.532, b=1.532, g=1.532, bire=0.0000, 2V(Calc)=0, 2V(Meas)=83.	Delhayelite 
Biaxial (-), a=1.532, b=1.535, g=1.537, bire=0.0050	Filatovite !
Biaxial (+), a=1.532, b=1.545, g=1.572, bire=0.0400, 2V(Calc)=72, 2V(Meas)=70.	Halurgite 
Biaxial (-), a=1.532, b=1.594, g=1.616, bire=0.0840, 2V(Calc)=58, 2V(Meas)=60.  Dispersion r < v weak.	Lanthanite-(Ce) 
Biaxial (-), a=1.532, b=1.59, g=1.614, bire=0.0820, 2V(Calc)=62, 2V(Meas)=61.	Lanthanite-(Nd) 
Biaxial (-), a=1.532, b=1.562, g=1.562, bire=0.0300, 2V(Calc)=0, 2V(Meas)=5.  Dispersion weak, r < v.	Nepskoeite !
Biaxial (?), a=1.532, g=1.543,  bire=0.0110	Nickelalumite *
Biaxial (-), a=1.532, b=1.565, g=1.567, bire=0.0350	Osakaite !
Biaxial (+), a=1.532, b=1.542, g=1.556, bire=0.0240, 2V(Calc)=82, 2V(Meas)=80.	Phaunouxite 
Biaxial (+), a=1.532, b=1.538, g=1.564, bire=0.0320, 2V(Calc)=52, 2V(Meas)=54.  Dispersion medium, r > v.	Studenitsite 
Biaxial (+), a=1.532, b=1.544, g=1.561, bire=0.0290, 2V(Calc)=82, 2V(Meas)=80.9-82.	Tuzlaite 
Biaxial (+), a=1.532, b=1.54, g=1.55, bire=0.0180, 2V(Calc)=86, 2V(Meas)=89.  Dispersion weak, r < v.	Varennesite 
Biaxial (-), a=1.532, b=1.537, g=1.54, bire=0.0080, 2V(Calc)=74, 2V(Meas)=75.  Dispersion r > v.	Vitimite !
Biaxial (-), a=1.532, b=1.552, g=1.567, bire=0.0350, 2V(Calc)=80, 2V(Meas)=80.	Zharchikhite 
Biaxial (+), a=1.533, b=1.534, g=1.538, bire=0.0050, 2V(Calc)=54, 2V(Meas)=57-59.  Dispersion r > v weak.	Amstallite 
Biaxial (-), a=1.533, b=1.544, g=1.548, bire=0.0150, 2V(Calc)=60, 2V(Meas)=82.	Behoite 
Biaxial (+), a=1.533, b=1.541, g=1.554, bire=0.0210, 2V(Calc)=78, 2V(Meas)=85.  Dispersion medium, r < v.	Hoganite !
Biaxial (-), a=1.533, b=1.545, g=1.547, bire=0.0140, 2V(Calc)=44, 2V(Meas)=50.  Dispersion r > v perceptible.	Mooreite 
Biaxial (-), a=1.533, b=1.54, g=1.541, bire=0.0080, 2V(Calc)=40, 2V(Meas)=41-49.	Nalipoite 
Biaxial (-), a=1.533, b=1.559, g=1.567, bire=0.0340, 2V(Calc)=56, 2V(Meas)=63.  Dispersion weak.	Natrolemoynite !
Biaxial (-), a=1.534, b=1.538, g=1.543, bire=0.0090, 2V(Calc)=84, 2V(Meas)=58.	Canasite 
Biaxial (+), a=1.534, b=1.543, g=1.558, bire=0.0240	Gordonite 
Biaxial (-), a=1.534, b=1.569, g=1.57, bire=0.0360, 2V(Calc)=18, 2V(Meas)=29-31.  Dispersion r > v weak.	Masutomilite 
Biaxial (-), a=1.534, b=1.562, g=1.563, bire=0.0290	Middendorfite !
Biaxial (+), a=1.534, b=1.553, g=1.638, bire=0.1040, 2V(Calc)=54, 2V(Meas)=27.	Rhomboclase 
Biaxial (-), a=1.534, b=1.59, g=1.6, bire=0.0660, 2V(Calc)=44, 2V(Meas)=44.	Shabaite-(Nd) 
Biaxial (+), a=1.534, b=1.554, g=1.586, bire=0.0520, 2V(Calc)=80, 2V(Meas)=78.	Zincocopiapite 
Biaxial (-), a=1.535, b=1.542, g=1.549, bire=0.0140, 2V(Calc)=88, 2V(Meas)=12-18.	Foshallasite ?
Biaxial (-), a=1.535, b=1.548, g=1.549, bire=0.0140	Gyrolite 
Biaxial (-), a=1.535, b=1.553, g=1.557, bire=0.0220, 2V(Calc)=50, 2V(Meas)=24.	Hydrocalumite 
Biaxial (+), b=1.535, 2V(Meas)=70.	Nekoite 
Biaxial (-), a=1.535, b=1.552, g=1.553, bire=0.0180, 2V(Calc)=26, 2V(Meas)=small.	Satimolite 
Biaxial (+), a=1.536, b=1.538, g=1.544, bire=0.0080, 2V(Calc)=62, 2V(Meas)=32.	Apophyllite-(NaF) 
Biaxial (+), a=1.536, b=1.539, g=1.542, bire=0.0060	Frankamenite !
Biaxial (-), a=1.536, b=1.539, g=1.542, bire=0.0060, 2V(Calc)=88, 2V(Meas)=84.	Gismondine 
Biaxial (-), a=1.536, b=1.545, g=1.553, bire=0.0170, 2V(Calc)=86, 2V(Meas)=87.  Dispersion r < v strong.	Intersilite !
Biaxial (?), a=1.536, g=1.563,  bire=0.0270	Jadarite !
Biaxial (?), a=1.536, g=1.55,  bire=0.0140	Loudounite 
Biaxial (-), a=1.536, b=1.57, g=1.628, bire=0.0920, 2V(Calc)=78, 2V(Meas)=77.  Dispersion r > v.	Xitieshanite 
Biaxial (+), a=1.536, b=1.559, g=1.697, bire=0.1610, 2V(Calc)=48, 2V(Meas)=30-45.  Dispersion r > v.	Zellerite 
Biaxial (-), a=1.525-1.548, b=1.551-1.58, g=1.554-1.586, bire=0.0290-0.0380, 2V(Calc)=36-46, 2V(Meas)=25-58.  Dispersion weak, r > v.	Lepidolite 
Biaxial (-), a=1.533-1.54, b=1.544-1.545, g=1.547-1.55, bire=0.0100-0.0140, 2V(Calc)=54-88, 2V(Meas)=50.  Dispersion r < v extreme.	Pentagonite 
Biaxial (+), a=1.537, b=1.538, g=1.541, bire=0.0040, 2V(Calc)=62, 2V(Meas)=59.2.  Dispersion r < v moderate.	Bigcreekite !
Biaxial (?), b=1.537	Endellite !
Biaxial (-), a=1.537, b=1.611, g=1.613, bire=0.0760	Ganophyllite 
Biaxial (-), a=1.537, b=1.55, g=1.556, bire=0.0190, 2V(Calc)=66, 2V(Meas)=52-71.	Naujakasite 
Biaxial (-), a=1.537, b=1.611, g=1.619, bire=0.0820, 2V(Calc)=34, 2V(Meas)=18.	Pokrovskite 
Biaxial (+), a=1.537, b=1.548, g=1.57, bire=0.0330, 2V(Calc)=72, 2V(Meas)=71.4-77.	Pringleite 
Biaxial (?), a=1.53-1.545, g=1.56-1.575,  bire=0.0300	Yakhontovite 
Biaxial (+), a=1.538, b=1.54, g=1.543, bire=0.0050	Bakhchisaraitsevite !
Biaxial (-), a=1.538, b=1.549, g=1.554, bire=0.0160, 2V(Calc)=66, 2V(Meas)=~50.	Edingtonite 
Biaxial (+), a=1.533-1.543, b=1.5368-1.5477, g=1.542-1.552, bire=0.0090, 2V(Calc)=82-86, 2V(Meas)=82.  Dispersion none.	Oligoclase 
Biaxial (+), a=1.539, b=1.546, g=1.551, bire=0.0120, 2V(Calc)=80, 2V(Meas)=86.	Brushite 
Biaxial (-), a=1.539, b=1.544, g=1.548, bire=0.0090, 2V(Calc)=82, 2V(Meas)=80-83.	Clinobehoite 
Biaxial (-), a=1.539, b=1.551, g=1.554, bire=0.0150, 2V(Calc)=52, 2V(Meas)=54.  Dispersion r < v.	Manganonaujakasite !
Biaxial (-), a=1.54, b=1.546, g=1.548, bire=0.0080, 2V(Calc)=58, 2V(Meas)=66.  Dispersion r > v.	Bulachite 
Biaxial (+), b=1.54, 2V(Meas)=50-60.	Calciocopiapite 
Biaxial (+), a=1.54, b=1.548, g=1.563, bire=0.0230, 2V(Calc)=74, 2V(Meas)=74.	Camgasite 
Biaxial (+), a=1.54, b=1.544, g=1.559, bire=0.0190, 2V(Calc)=56, 2V(Meas)=54-55.	Farringtonite 
Biaxial (-), a=1.54, b=1.554, g=1.562, bire=0.0220, 2V(Calc)=72, 2V(Meas)=60.	Glaucocerinite 
Biaxial (+), a=1.54, b=1.553, g=1.57, bire=0.0300, 2V(Calc)=84, 2V(Meas)=80.	Lemoynite 
Biaxial (-), a=1.54, b=1.551, g=1.557, bire=0.0170	Manaksite 
Biaxial (-), a=1.54, b=1.552, g=1.558, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70.	Moreauite 
Biaxial (-), a=1.54, b=1.548, g=1.553, bire=0.0130	Nevadaite !
Biaxial (-), a=1.54, b=1.73, g=1.75, bire=0.2100, 2V(Calc)=32, 2V(Meas)=33.  Dispersion weak, r > v.	Piretite !
Biaxial (-), a=1.54, b=1.542, g=1.55, bire=0.0100, 2V(Calc)=54, 2V(Meas)=53.	Raite 
Biaxial (+), a=1.54, b=1.552, g=1.57, bire=0.0300, 2V(Calc)=80, 2V(Meas)=85.	Rauenthalite 
Biaxial (+), a=1.54, b=1.56, g=1.58-1.6, bire=0.0400-0.0600, 2V(Calc)=74-88, 2V(Meas)=103.5-103..	Tuperssuatsiaite 
Biaxial (-), a=1.541, b=1.553, g=1.56, bire=0.0190	Beryllite 
Biaxial (+), a=1.541, b=1.56, g=1.567, bire=0.0260, 2V(Calc)=60, 2V(Meas)=84.	Fenaksite 
Biaxial (-), a=1.541, b=1.557, g=1.565, bire=0.0240, 2V(Calc)=68, 2V(Meas)=60-71.	Girvasite 
Biaxial (-), a=1.541, b=1.568, g=1.57, bire=0.0290, 2V(Calc)=30, 2V(Meas)=32.	Pseudo-autunite *
Biaxial (-), a=1.541, b=1.563, g=1.564, bire=0.0230, 2V(Calc)=22, 2V(Meas)=23.  Dispersion weak, r < v.	Tancoite 
Biaxial (+), a=1.541, b=1.547, g=1.564, bire=0.0230, 2V(Calc)=62, 2V(Meas)=60.  Dispersion r > v strong.	Voglite 
Biaxial (+), a=1.542, b=1.548, g=1.641, bire=0.0990, 2V(Calc)=30, 2V(Meas)=30.	Alumoklyuchevskite 
Biaxial (+), a=1.542, b=1.544, g=1.551, bire=0.0090, 2V(Calc)=58, 2V(Meas)=52.	Cavansite 
Biaxial (-), a=1.542, b=1.545, g=1.547, bire=0.0050	Hyalophane 
Biaxial (+), a=1.542, b=1.545, g=1.565, bire=0.0230, 2V(Calc)=44, 2V(Meas)=42.5-47.	Ruitenbergite 
Biaxial (-), a=1.542, b=1.569, g=1.571, bire=0.0290	Seidite-(Ce) !
Biaxial (+), a=1.542, b=1.551, g=1.587, bire=0.0450, 2V(Calc)=56, 2V(Meas)=54.	Zincobotryogen 
Biaxial (-), a=1.543, b=1.5682, g=1.5688, bire=0.0258	Fluorophlogopite !
Biaxial (+), a=1.543, b=1.575, g=1.634, bire=0.0910, 2V(Calc)=76, 2V(Meas)=60.	Metasideronatrite 
Biaxial (?), a=1.543, g=1.549,  bire=0.0060	Pyrophosphite *
Biaxial (-), a=1.543, b=1.571, g=1.577, bire=0.0340, 2V(Calc)=48, 2V(Meas)=49.	Shabynite 
Biaxial (-), a=1.525-1.561, b=1.545-1.581, g=1.545-1.581, bire=0.0200, 2V(Calc)=0, 2V(Meas)=0-8.  Dispersion weak, r > v.	Vermiculite 
Biaxial (-), a=1.527-1.56, b=1.532-1.574, g=1.538-1.578, bire=0.0110-0.0180, 2V(Calc)=54-86, 2V(Meas)=75-89.  Dispersion weak, r < v.	Cordierite 
Biaxial (+), a=1.544, b=1.546, g=1.549, bire=0.0050, 2V(Calc)=80, 2V(Meas)=78.	Chkalovite 
Biaxial (-), a=1.544, b=1.578, g=1.602, bire=0.0580, 2V(Calc)=78, 2V(Meas)=65.  Dispersion medium, r > v.	Coskrenite-(Ce) !
Biaxial (+), a=1.544, b=1.544, g=1.546, bire=0.0020, 2V(Calc)=0, 2V(Meas)=22.	Epididymite 
Biaxial (-), a=1.544, b=1.578, g=1.601, bire=0.0570, 2V(Calc)=76, 2V(Meas)=78.7.	Krohnkite 
Biaxial (-), a=1.538-1.55, b=1.575-1.594, g=1.575-1.6, bire=0.0370-0.0500, 2V(Calc)=0-38, 2V(Meas)=0-30.  Dispersion noticeable, r > v.	Talc 
Biaxial (-), a=1.544, b=1.608, g=1.608, bire=0.0640, 2V(Calc)=0, 2V(Meas)=0-5.	Wonesite 
Biaxial (+), a=1.545, b=1.553, g=1.566, bire=0.0210, 2V(Calc)=78, 2V(Meas)=77.	Doyleite 
Biaxial (+), a=1.545, b=1.546, g=1.551, bire=0.0060, 2V(Calc)=50, 2V(Meas)=30.  Dispersion r > v distinct.	Eudidymite 
Biaxial (-), a=1.545, b=1.583, g=1.583, bire=0.0380, 2V(Calc)=0, 2V(Meas)=10.	Franklinphilite 
Biaxial (-), a=1.534-1.556, b=1.586-1.589, g=1.596-1.601, bire=0.0450-0.0620, 2V(Calc)=46-60, 2V(Meas)=53-62.  Dispersion none.	Pyrophyllite 
Biaxial (+), a=1.545, b=1.555, g=1.68, bire=0.1350	Studtite 
Biaxial (-), a=1.543-1.548, g=1.55-1.556,  bire=0.0070-0.0080	Ursilite *
Biaxial (-), a=1.546, b=1.572, g=1.576, bire=0.0300, 2V(Calc)=42, 2V(Meas)=42.	Defernite 
Biaxial (-), a=1.543-1.549, b=1.564-1.567, g=1.57-1.575, bire=0.0260-0.0270	Furongite 
Biaxial (-), a=1.546, b=1.563, g=1.58, bire=0.0340, 2V(Calc)=88, 2V(Meas)=89.	Lacroixite 
Biaxial (-), a=1.546, b=1.574, g=1.575, bire=0.0290	Litvinskite !
Biaxial (+/-), a=1.546, b=1.576, g=1.576, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0-8.	Parsettensite 
Biaxial (?), a=1.547, b=1.555, g=1.571, bire=0.0240	Glucine 
Biaxial (-), a=1.546-1.548, b=1.558-1.562, g=1.567, bire=0.0190-0.0210, 2V(Calc)=60-80, 2V(Meas)=60-62.	Polyhalite 
Biaxial (+), a=1.547, b=1.566, g=1.594, bire=0.0470, 2V(Calc)=82, 2V(Meas)=70.	Quenstedtite 
Biaxial (+), a=1.548, b=1.555, g=1.574, bire=0.0260	Anorthominasragrite !
Biaxial (-), a=1.548, b=1.55, 	Cloncurryite !
Biaxial (-), a=1.548, b=1.574, , 2V(Meas)=56.	Litidionite 
Biaxial (+/-), a=1.543-1.554, b=1.5469-1.5587, g=1.552-1.562, bire=0.0080-0.0090, 2V(Calc)=78-84, 2V(Meas)=76-83.  Dispersion none.	Andesine *
Biaxial (+), a=1.547-1.55, b=1.549-1.552, g=1.559-1.565, bire=0.0120-0.0150, 2V(Calc)=44-50, 2V(Meas)=48.  Dispersion r > v moderate.	Partheite 
Biaxial (-), a=1.549, b=1.569, g=1.571, bire=0.0220, 2V(Calc)=34, 2V(Meas)=40.	Dittmarite 
Biaxial (-), a=1.549, b=1.55, g=1.68, bire=0.1310	Klyuchevskite 
Biaxial (+), a=1.549, b=1.55, g=1.68, bire=0.1310	Klyuchevskite-Duplicate 
Biaxial (+), a=1.549, b=1.551, g=1.621, bire=0.0720, 2V(Calc)=20, 2V(Meas)=25.  Dispersion r < v strong.	Veatchite-A 
Biaxial (+), a=1.55, b=1.585, g=1.641, bire=0.0910, 2V(Calc)=80, 2V(Meas)=68-80.	Ajoite 
Biaxial (-), a=1.55, b=1.552, g=1.556, bire=0.0060, 2V(Calc)=72, 2V(Meas)=59.9-60.	Armenite 
Biaxial (+), a=1.55, b=1.553, g=1.559, bire=0.0090, 2V(Calc)=72, 2V(Meas)=28-30.	Charoite 
Biaxial (-), a=1.55, b=1.588, g=1.59, bire=0.0400, 2V(Calc)=24, 2V(Meas)=40.	Coconinoite 
Biaxial (?), b=1.55	Falcondoite 
Biaxial (+), a=1.55, b=1.59, g=1.63, bire=0.0800	Hambergite 
Biaxial (-), a=1.548-1.552, b=1.562-1.564, g=1.57-1.571, bire=0.0190-0.0220, 2V(Calc)=72-74, 2V(Meas)=74.	Jennite 
Biaxial (+), a=1.55, b=1.561, g=1.577, bire=0.0270	Metavauxite 
Biaxial (+/-), a=1.55, b=1.554, g=1.592, bire=0.0420	Penobsquisite !
Biaxial (?), b=1.55	Plombierite 
Biaxial (+), a=1.55, b=1.553, g=1.62, bire=0.0700, 2V(Calc)=26, 2V(Meas)=25.	Veatchite-p !
Biaxial (+), a=1.551, b=1.558, g=1.582, bire=0.0310, 2V(Calc)=58, 2V(Meas)=55.	Metavariscite 
Biaxial (-), a=1.551, b=1.563, g=1.565, bire=0.0140, 2V(Calc)=44, 2V(Meas)=43.	Morinite 
Biaxial (-), a=1.551, b=1.584, g=1.588, bire=0.0370, 2V(Calc)=36, 2V(Meas)=46.  Dispersion r > v weak.	Nanpingite 
Biaxial (+), a=1.551, b=1.555, g=1.562, bire=0.0110, 2V(Calc)=76, 2V(Meas)=32.  Dispersion r > v strong.	Vauxite 
Biaxial (+), a=1.551, b=1.553, g=1.62, bire=0.0690, 2V(Calc)=22, 2V(Meas)=37.	Veatchite 
Biaxial (+), a=1.55-1.553, b=1.557-1.558, g=1.566-1.567, bire=0.0140-0.0160, 2V(Calc)=74-84, 2V(Meas)=69-80.	Lithiophosphate 
Biaxial (-), a=1.53-1.573, b=1.557-1.617, g=1.558-1.618, bire=0.0280-0.0450, 2V(Calc)=16-20, 2V(Meas)=0-12.  Dispersion weak to distinct, r < v.	Phlogopite 
Biaxial (-), a=1.541-1.5625, b=1.565, g=1.553-1.568, bire=0.0055-0.0120, 2V(Meas)=37-61.	Lizardite 
Biaxial (-), a=1.552, b=1.5579, g=1.561, bire=0.0090	Beryllonite 
Biaxial (-), a=1.552, b=1.5605, g=1.561, bire=0.0090, 2V(Calc)=26, 2V(Meas)=24.  Dispersion r < v.	Kulkeite 
Biaxial (-), a=1.55-1.554, b=1.55-1.554, g=1.649-1.658, bire=0.0990-0.1040, 2V(Calc)=0, 2V(Meas)=0.	Mckelveyite-(Y) 
Biaxial (+), a=1.552, b=1.559, g=1.572, bire=0.0200, 2V(Calc)=74, 2V(Meas)=72.	Paravauxite 
Biaxial (+), a=1.552, b=1.552, g=1.558, bire=0.0060, 2V(Calc)=0, 2V(Meas)=23.	Rimkorolgite !
Biaxial (-), a=1.552, b=1.578, g=1.581, bire=0.0290, 2V(Calc)=36, 2V(Meas)=37.08.	Svyatoslavite 
Biaxial (-), a=1.535-1.57, b=1.555-1.6, g=1.565-1.605, bire=0.0300-0.0350, 2V(Calc)=42-68, 2V(Meas)=5-25.  Dispersion none.	Brammallite *
Biaxial (-), a=1.535-1.57, b=1.555-1.6, g=1.565-1.605, bire=0.0300-0.0350, 2V(Calc)=42-68, 2V(Meas)=5-25.  Dispersion none.	Illite *
Biaxial (-), a=1.553, b=1.575, g=1.577, bire=0.0240	Autunite 
Biaxial (-), a=1.553, b=1.594, g=1.594, bire=0.0410, 2V(Calc)=0, 2V(Meas)=0.	Lennilenapeite 
Biaxial (-), a=1.542-1.564, b=1.57, g=1.548-1.74, bire=0.0060-0.1760	Tosudite 
Biaxial (+), a=1.554, b=1.564, g=1.595, bire=0.0410, 2V(Calc)=62, 2V(Meas)=59.	Baricite 
Biaxial (?), a=1.554, b=1.577, g=1.618, bire=0.0640	Bonattite 
Biaxial (-), a=1.554, b=1.565, g=1.573, bire=0.0190, 2V(Calc)=80, 2V(Meas)=80.	Reedmergnerite 
Biaxial (+), a=1.555, b=1.561, g=1.574, bire=0.0190	Bobjonesite !
Biaxial (+), a=1.555, b=1.558, g=1.566, bire=0.0110, 2V(Calc)=64, 2V(Meas)=64.  Dispersion r > v moderate.	Moskvinite-(Y) !
Biaxial (-), a=1.53-1.58, b=1.555-1.612, g=1.56-1.615, bire=0.0300-0.0350, 2V(Calc)=32-46, 2V(Meas)=5-66.  Dispersion r > v strong.	Nontronite 
Biaxial (-), a=1.555, b=1.643, g=1.658, bire=0.1030, 2V(Calc)=42, 2V(Meas)=43.	Sibirskite 
Biaxial (-), a=1.551-1.56, b=1.564, g=1.569, bire=0.0090-0.0180, 2V(Calc)=62-84, 2V(Meas)=small.	Volkonskoite 
Biaxial (-), a=1.551-1.561, b=1.646, g=1.652, bire=0.0910-0.1010, 2V(Calc)=26-28, 2V(Meas)=0-20.	Donnayite-(Y) 
Biaxial (+), a=1.556, b=1.56, g=1.58, bire=0.0240, 2V(Calc)=50, 2V(Meas)=62.	Ehrleite 
Biaxial (+), a=1.556, b=1.561, g=1.571, bire=0.0150, 2V(Calc)=72, 2V(Meas)=70-71.	Mangangordonite 
Biaxial (-), a=1.556, b=1.65, g=1.653, bire=0.0970, 2V(Calc)=18, 2V(Meas)=10-13.	Mckelveyite-(Nd) *
Biaxial (+), a=1.556, b=1.593, g=1.663, bire=0.1070	Parasibirskite !
Biaxial (-), a=1.557, b=1.587, g=1.593, bire=0.0360, 2V(Calc)=46, 2V(Meas)=44.	Boromuscovite 
Biaxial (-), a=1.557, b=1.58, g=1.58, bire=0.0230, 2V(Calc)=0, 2V(Meas)=10.  Dispersion none.	Chistyakovaite !
Biaxial (-), a=1.545-1.569, b=1.546-1.569, g=1.553-1.571, bire=0.0020-0.0080, 2V(Calc)=0-42, 2V(Meas)=20-60.  Dispersion relatively weak.	Clinochrysotile ?
Biaxial (+), a=1.557, b=1.561, g=1.567, bire=0.0100, 2V(Calc)=80, 2V(Meas)=80.	Clinophosinaite !
Biaxial (-), a=1.557, b=1.598, g=1.602, bire=0.0450	Haigerachite !
Biaxial (-), a=1.557, b=1.562, g=1.563, bire=0.0060, 2V(Calc)=48, 2V(Meas)=40.	Nacrite 
Biaxial (-), a=1.557, b=1.568, g=1.57, bire=0.0130, 2V(Calc)=44, 2V(Meas)=54.  Dispersion weak, r > v.	Olshanskyite 
Biaxial (-), a=1.545-1.569, b=1.546-1.569, g=1.553-1.571, bire=0.0020-0.0080, 2V(Calc)=0-42, 2V(Meas)=20-60.  Dispersion relatively weak.	Orthochrysotile ?
Biaxial (-), a=1.545-1.569, b=1.546-1.569, g=1.553-1.571, bire=0.0020-0.0080, 2V(Calc)=0-42, 2V(Meas)=20-60.  Dispersion relatively weak.	Parachrysotile ?
Biaxial (-), a=1.557, b=1.565, g=1.571, bire=0.0140, 2V(Calc)=80, 2V(Meas)=81.	Viitaniemiite 
Biaxial (-), a=1.555-1.56, b=1.575-1.587, g=1.581-1.595, bire=0.0260-0.0350, 2V(Calc)=56, 2V(Meas)=28-30.	Tobelite 
Biaxial (+), a=1.558, b=1.575, g=1.62, bire=0.0620, 2V(Calc)=66, 2V(Meas)=63.	Cuprocopiapite 
Biaxial (-), a=1.553-1.563, b=1.559-1.569, g=1.56-1.57, bire=0.0070, 2V(Calc)=44, 2V(Meas)=24-50.  Dispersion none.	Kaolinite 
Biaxial (?), a=1.558, g=1.56,  bire=0.0020	Pyrocoproite *
Biaxial (-), a=1.558, b=1.646, g=1.648, bire=0.0900, 2V(Calc)=16, 2V(Meas)=~15.	Weloganite 
Biaxial (-), a=1.558, b=1.576, g=1.593, bire=0.0350, 2V(Calc)=86, 2V(Meas)=87.	Xiangjiangite 
Biaxial (+), a=1.554-1.563, b=1.5588-1.5675, g=1.562-1.573, bire=0.0080-0.0100, 2V(Calc)=78-86, 2V(Meas)=85.	Labradorite *
Biaxial (?), a=1.544-1.574, b=1.586-1.611, g=1.589-1.612, bire=0.0380-0.0450, 2V(Calc)=18-28, 2V(Meas)=small.  Dispersion r < v moderate.	Bannisterite 
Biaxial (-), a=1.559, b=1.653, g=1.68, bire=0.1210, 2V(Calc)=52, 2V(Meas)=55.	Callaghanite 
Biaxial (?), a=1.553-1.565, b=1.559-1.569, g=1.56-1.57, bire=0.0050-0.0070	Halloysite 
Biaxial (-), a=1.559, b=1.643, g=1.655, bire=0.0960	Hohmannite 
Biaxial (+), a=1.559, b=1.562, g=1.572, bire=0.0130, 2V(Calc)=58, 2V(Meas)=60.	Mcnearite 
Biaxial (-), a=1.559, b=1.616, g=1.624, bire=0.0650, 2V(Calc)=38, 2V(Meas)=40.	Phuralumite 
Biaxial (-), a=1.559, b=1.57, g=1.574, bire=0.0150, 2V(Calc)=60, 2V(Meas)=61.  Dispersion r > v strong.	Saleeite 
Biaxial (+), a=1.558-1.562, b=1.56-1.565, g=1.563-1.571, bire=0.0050-0.0090, 2V(Calc)=72-80, 2V(Meas)=52-80.  Dispersion none.	Dickite 
Biaxial (+), a=1.56, b=1.65, g=1.674, bire=0.1140	Elpidite 
Biaxial (+), a=1.56, b=1.566, g=1.586, bire=0.0260, 2V(Calc)=58, 2V(Meas)=25.	Fransoletite 
Biaxial (-), a=1.56, b=1.635, g=1.635, bire=0.0750	Gilalite 
Biaxial (+), a=1.56, b=1.569, g=1.584, bire=0.0240, 2V(Calc)=78, 2V(Meas)=79.	Gorgeyite 
Biaxial (?), a=1.56, g=1.57,  bire=0.0100	Lisetite 
Biaxial (-), a=1.56, b=1.614, g=1.615, bire=0.0550, 2V(Calc)=14, 2V(Meas)=5-7.	Preiswerkite 
Biaxial (-), a=1.56, b=1.563, g=1.565, bire=0.0050, 2V(Calc)=78, 2V(Meas)=43.	Schoderite 
Biaxial (+), a=1.56, b=1.56, g=1.57, bire=0.0100	Stevensite 
Biaxial (-), a=1.56, b=1.574, g=1.58, bire=0.0200, 2V(Calc)=64, 2V(Meas)=70.	Switzerite 
Biaxial (-), a=1.56, b=1.582, g=1.587, bire=0.0270, 2V(Calc)=50, 2V(Meas)=0-5.  Dispersion r > v moderate.	Uranospinite 
Biaxial (-), a=1.555-1.567, b=1.56-1.573, g=1.56-1.573, bire=0.0050-0.0060, 2V(Calc)=0, 2V(Meas)=20-50.  Dispersion weak, r > v.	Antigorite 
Biaxial (-), b=1.56-1.562, g=1.565-1.567, , 2V(Meas)=10.	Hydrobiotite 
Biaxial (-), a=1.561, b=1.563, g=1.564, bire=0.0030, 2V(Calc)=70, 2V(Meas)=51.  Dispersion strong, r > v.	Lisitsynite !
Biaxial (-), a=1.561, b=1.572, g=1.576, bire=0.0150, 2V(Calc)=60, 2V(Meas)=66.	Sekaninaite 
Biaxial (-), a=1.553-1.57, g=1.569-1.594,  bire=0.0160-0.0240	Karpinskite 
Biaxial (+), a=1.552-1.571, b=1.555-1.574, g=1.565-1.576, bire=0.0050-0.0130	Woodwardite 
Biaxial (+), a=1.562, b=1.572, g=1.585, bire=0.0230, 2V(Calc)=84, 2V(Meas)=83.	Ferrarisite 
Biaxial (+), a=1.562, b=1.564, g=1.588, bire=0.0260, 2V(Calc)=34, 2V(Meas)=33.	Parafransoletite 
Biaxial (+), a=1.562, b=1.566, g=1.587, bire=0.0250, 2V(Calc)=48, 2V(Meas)=53.  Dispersion r > v weak.	Senegalite 
Biaxial (+), a=1.562, b=1.595, g=1.632, bire=0.0700, 2V(Calc)=90, 2V(Meas)=90.	Szmikite 
Biaxial (-), a=1.562, b=1.593, g=1.593, bire=0.0310, 2V(Calc)=0, 2V(Meas)=< 5.  Dispersion no dispersion.	Uramarsite !
Biaxial (-), a=1.563, b=1.569, g=1.573, bire=0.0100	Armstrongite 
Biaxial (?), a=1.563, b=1.572, g=1.586, bire=0.0230, 2V(Calc)=80, 2V(Meas)=70.	Frolovite 
Biaxial (+), a=1.563, b=1.571, g=1.596, bire=0.0330, 2V(Calc)=60, 2V(Meas)=60.	Hornesite 
Biaxial (-), a=1.563, b=1.582, g=1.592, bire=0.0290, 2V(Calc)=70, 2V(Meas)=70.  Dispersion r > v strong.	Maricopaite 
Biaxial (?), a=1.552-1.574, b=1.582-1.61, g=1.586-1.616, bire=0.0340-0.0420, 2V(Calc)=38-42, 2V(Meas)=30-47.  Dispersion weak to distinct, r > v.	Muscovite 
Biaxial (+), a=1.563, b=1.567, g=1.59, bire=0.0270	Norbergite 
Biaxial (+), a=1.563, b=1.586, g=1.619, bire=0.0560, 2V(Calc)=82, 2V(Meas)=76.  Dispersion r < v.	Sigloite 
Biaxial (+), a=1.563, b=1.564, g=1.574, bire=0.0110, 2V(Calc)=36, 2V(Meas)=32.	Stronalsite 
Biaxial (-), a=1.563, b=1.588, g=1.594, bire=0.0310, 2V(Calc)=50, 2V(Meas)=moderate.  Dispersion r < v weak.	Variscite 
Biaxial (-), a=1.563, b=1.621, g=1.621, bire=0.0580, 2V(Calc)=0, 2V(Meas)=50-66.	Znucalite 
Biaxial (-), a=1.564, g=1.598,  bire=0.0340, 2V(Meas)=50-60.	Mantienneite 
Biaxial (-), a=1.564, b=1.581, g=1.582, bire=0.0180	Sabugalite 
Biaxial (-), a=1.564, b=1.585, g=1.585, bire=0.0210, 2V(Calc)=0, 2V(Meas)=0-3.	Uramphite 
Biaxial (+), a=1.565, b=1.568, g=1.58, bire=0.0150, 2V(Calc)=54, 2V(Meas)=medium.	Isoclasite 
Biaxial (-), a=1.565, b=1.645, g=1.725, bire=0.1600	Novgorodovaite !
Biaxial (+/-), a=1.565, b=1.565-1.603, g=1.565-1.603, bire=0.0000-0.0380, 2V(Calc)=0, 2V(Meas)=0.	Pecoraite 
Biaxial (-), a=1.55-1.58, b=1.59-1.62, g=1.59-1.62, bire=0.0400, 2V(Calc)=0, 2V(Meas)=0-20.	Sauconite 
Biaxial (-), a=1.56-1.571, b=1.575-1.58, g=1.578-1.582, bire=0.0110-0.0180, 2V(Calc)=46-50, 2V(Meas)=15.  Dispersion r > v strong.	Haiweeite 
Biaxial (+), a=1.566, b=1.572, g=1.584, bire=0.0180, 2V(Calc)=72, 2V(Meas)=70.  Dispersion dispersion not observed.	Angastonite !
Biaxial (-), a=1.566, b=1.606, g=1.606, bire=0.0400, 2V(Calc)=0, 2V(Meas)=9.	Eggletonite 
Biaxial (-), a=1.5665, b=1.574, g=1.5815, bire=0.0150	Kastningite !
Biaxial (-), a=1.567, b=1.579, g=1.581, bire=0.0140	Agrellite 
Biaxial (+), a=1.567, b=1.568, g=1.576, bire=0.0090	Denisovite 
Biaxial (-), a=1.567, b=1.576, g=1.579, bire=0.0120, 2V(Calc)=58, 2V(Meas)=51.	Panethite 
Biaxial (-), a=1.567, b=1.569, g=1.57, bire=0.0030, 2V(Calc)=70, 2V(Meas)=68.	Phosinaite-(Ce) !
Biaxial (-), a=1.567, b=1.654, g=1.722, bire=0.1550, 2V(Calc)=78, 2V(Meas)=83.	Tatarskite 
Biaxial (-), a=1.567, g=1.588,  bire=0.0210	Zinalsite !
Biaxial (+/-), a=1.563-1.572, b=1.568-1.5784, g=1.573-1.583, bire=0.0100-0.0110, 2V(Calc)=80-88, 2V(Meas)=86.	Bytownite *
Biaxial (-), a=1.568, b=1.584, g=1.585, bire=0.0170, 2V(Calc)=26, 2V(Meas)=28.	Laplandite-(Ce) 
Biaxial (-), a=1.568, b=1.574, g=1.58, bire=0.0120, 2V(Calc)=88, 2V(Meas)=75.	Overite 
Biaxial (-), a=1.568, b=1.597, g=1.6, bire=0.0320, 2V(Calc)=34, 2V(Meas)=33.	Thadeuite 
Biaxial (-), a=1.569, b=1.657, g=1.686, bire=0.1170, 2V(Calc)=56, 2V(Meas)=54.	Calkinsite-(Ce) 
Biaxial (-), a=1.569, b=1.679, g=1.708, bire=0.1390, 2V(Calc)=50, 2V(Meas)=52.	Carbocernaite 
Biaxial (?), a=1.569, g=1.57,  bire=0.0010	Chrysotile !
Biaxial (+), a=1.56-1.578, b=1.566-1.582, g=1.572-1.596, bire=0.0120-0.0180, 2V(Calc)=58-88, 2V(Meas)=48-55.  Dispersion r > v.	Donbassite 
Biaxial (+), a=1.569, b=1.574, g=1.59, bire=0.0210, 2V(Calc)=60, 2V(Meas)=58.  Dispersion medium, r > v.	Ershovite 
Biaxial (+), a=1.568-1.57, b=1.568-1.57, g=1.586-1.587, bire=0.0170-0.0180, 2V(Calc)=0, 2V(Meas)=0-5.  Dispersion r > v or r < v.	Gibbsite 
Biaxial (+), a=1.569, b=1.569, g=1.571, bire=0.0020, 2V(Calc)=0, 2V(Meas)=17.  Dispersion dispersion not observed.	Glagolevite !
Biaxial (?), a=1.569, b=1.592, g=1.62, bire=0.0510	Lokkaite-(Y) 
Biaxial (+), a=1.569, b=1.594, g=1.622, bire=0.0530, 2V(Calc)=90, 2V(Meas)=81-88.	Voggite 
Biaxial (+), a=1.5695, b=1.571, g=1.5775, bire=0.0080, 2V(Calc)=52, 2V(Meas)=41.	Banalsite 
Biaxial (-), a=1.57, g=1.572,  bire=0.0020	Englishite 
Biaxial (+), a=1.57, b=1.573, g=1.578, bire=0.0080, 2V(Calc)=76, 2V(Meas)=~30.  Dispersion r < v strong.	Goldquarryite !
Biaxial (+), a=1.57, b=1.576, g=1.63, bire=0.0600	Gunningite 
Biaxial (?), a=1.57, g=1.95,  bire=0.3800	Moolooite 
Biaxial (+), a=1.57, b=1.571, g=1.575, bire=0.0050	Tobermorite 
Biaxial (+), a=1.57, g=1.577,  bire=0.0070, 2V(Meas)=38.	Tokkoite 
Biaxial (-), a=1.57, b=1.584, g=1.585, bire=0.0150, 2V(Calc)=28, 2V(Meas)=40.	Torreyite 
Biaxial (-), a=1.57, b=1.588, g=1.594, bire=0.0240	Tumchaite !
Biaxial (-), a=1.57, g=1.584,  bire=0.0140	Uranosilite 
Biaxial (-), a=1.5702, b=1.5824, g=1.5869, bire=0.0167	Paracelsian 
Biaxial (+), a=1.569-1.573, b=1.574-1.579, g=1.609-1.618, bire=0.0400-0.0450, 2V(Calc)=44, 2V(Meas)=36-45.  Dispersion r < v.	Anhydrite 
Biaxial (-), a=1.571, b=1.613, g=1.623, bire=0.0520, 2V(Calc)=50, 2V(Meas)=51.	Ktenasite 
Biaxial (-), a=1.571, b=1.595, g=1.598, bire=0.0270	Leucophanite 
Biaxial (+), a=1.571, g=1.59,  bire=0.0190	Nefedovite 
Biaxial (-), a=1.57-1.573, b=1.581-1.582, g=1.585-1.586, bire=0.0130-0.0150, 2V(Calc)=60-66, 2V(Meas)=55-82.  Dispersion r < v medium.	Slawsonite 
Biaxial (-), a=1.572, b=1.579, g=1.583, bire=0.0110, 2V(Calc)=72, 2V(Meas)=75.	Calcioferrite 
Biaxial (-), a=1.572, b=1.59, g=1.601, bire=0.0290, 2V(Calc)=74, 2V(Meas)=60.	Kolbeckite 
Biaxial (+), a=1.572, b=1.586, g=1.64, bire=0.0680, 2V(Calc)=56, 2V(Meas)=49-62.  Dispersion very weak, r > v.	Kornelite 
Biaxial (-), a=1.572, b=1.578, g=1.582, bire=0.0100, 2V(Calc)=78, 2V(Meas)=75.	Montgomeryite 
Biaxial (-), a=1.564-1.58, b=1.594-1.609, g=1.6-1.609, bire=0.0290-0.0360, 2V(Calc)=0-46, 2V(Meas)=0-40.	Paragonite 
Biaxial (-), a=1.571-1.573, b=1.59-1.591, g=1.593-1.594, bire=0.0210-0.0220, 2V(Calc)=42-44, 2V(Meas)=32-44.  Dispersion r < v strong.	Priceite 
Biaxial (+), a=1.5722, b=1.5781, g=1.5801, bire=0.0079, 2V(Calc)=60, 2V(Meas)=60.	Wulfingite 
Biaxial (-), a=1.56-1.585, b=1.582-1.612, g=1.582-1.612, bire=0.0220-0.0270, 2V(Calc)=0, 2V(Meas)=0-10.	Corrensite 
Biaxial (+), a=1.573, b=1.592, g=1.599, bire=0.0260	Gaidonnayite 
Biaxial (-), a=1.572-1.574, b=1.582-1.591, g=1.59-1.592, bire=0.0180, 2V(Calc)=26-82, 2V(Meas)=0-36.  Dispersion none.	Hopeite 
Biaxial (+), a=1.573, b=1.576, g=1.579, bire=0.0060, 2V(Calc)=88, 2V(Meas)=90.	Ilmajokite 
Biaxial (+), a=1.573, b=1.586, g=1.626, bire=0.0530, 2V(Calc)=62, 2V(Meas)=60.  Dispersion medium, r > v.	Jarandolite !
Biaxial (+), a=1.573, b=1.574, g=1.636, bire=0.0630, 2V(Calc)=16, 2V(Meas)=15.	Kaatialaite 
Biaxial (-), a=1.573, b=1.583, g=1.588, bire=0.0150, 2V(Calc)=70, 2V(Meas)=70.	Threadgoldite 
Biaxial (+), a=1.5736, b=1.5759, g=1.5877, bire=0.0141, 2V(Calc)=48, 2V(Meas)=50.816.	Augelite 
Biaxial (-), a=1.572-1.576, b=1.5785-1.5832, g=1.583-1.588, bire=0.0110-0.0120, 2V(Calc)=78, 2V(Meas)=78.  Dispersion relatively weak.	Anorthite 
Biaxial (?), a=1.574, b=1.58, g=1.591, bire=0.0170	Borocookeite !
Biaxial (-), a=1.574, b=1.591, g=1.597, bire=0.0230, 2V(Calc)=60, 2V(Meas)=63.  Dispersion dispersion not observed.	Bussyite-(Ce) !
Biaxial (+), a=1.572-1.576, b=1.579-1.584, g=1.589-1.6, bire=0.0170-0.0240	Cookeite 
Biaxial (-), a=1.574, b=1.579, g=1.582, bire=0.0080	Juonniite !
Biaxial (-), a=1.574, b=1.587, g=1.599, bire=0.0250, 2V(Calc)=86, 2V(Meas)=88.	Krauskopfite 
Biaxial (+), a=1.574, b=1.58, g=1.618, bire=0.0440	Matveevite ?
Biaxial (-), a=1.574, b=1.583, g=1.588, bire=0.0140, 2V(Calc)=72, 2V(Meas)=70.	Uranocircite 
Biaxial (+/-), a=1.572-1.577, b=1.592-1.597, g=1.612-1.616, bire=0.0390-0.0400, 2V(Calc)=86-88, 2V(Meas)=90.  Dispersion relatively strong.	Johannite 
Biaxial (+), a=1.573-1.576, b=1.573-1.576, g=1.594-1.596, bire=0.0200-0.0210	Preobrazhenskite 
Biaxial (+/-), a=1.575, b=1.58, g=1.585, bire=0.0100, 2V(Calc)=88, 2V(Meas)=89.8.	Clinotobermorite 
Biaxial (-), a=1.575, b=1.59, g=1.601, bire=0.0260, 2V(Calc)=80, 2V(Meas)=72.	Dalyite 
Biaxial (+), a=1.575, b=1.575, g=1.581, bire=0.0060, 2V(Calc)=0, 2V(Meas)=0-5.  Dispersion very weak.	Dozyite 
Biaxial (+), a=1.575, g=1.62,  bire=0.0450, 2V(Meas)=74.	Ferricopiapite 
Biaxial (-), b=1.57-1.58, 2V(Meas)=0-25.	Fritzscheite 
Biaxial (-), a=1.575, b=1.581, g=1.583, bire=0.0080, 2V(Calc)=58, 2V(Meas)=62.	Kingsmountite 
Biaxial (+), a=1.575, b=1.578, g=1.584, bire=0.0090, 2V(Calc)=72, 2V(Meas)=76.  Dispersion r > v strong.	Nifontovite 
Biaxial (-), a=1.575, b=1.589, g=1.603, bire=0.0280, 2V(Calc)=88, 2V(Meas)=89.	Vochtenite 
Biaxial (+), b=1.57-1.582, g=1.626-1.631, 	Bukovskyite 
Biaxial (-), a=1.576, b=1.582, g=1.584, bire=0.0080	Guerinite 
Biaxial (-), a=1.576, b=1.583, g=1.587, bire=0.0110, 2V(Calc)=72, 2V(Meas)=61.	Lunijianlaite 
Biaxial (-), b=1.576, g=1.582, , 2V(Meas)=60.	Matulaite 
Biaxial (-), a=1.576, b=1.582, g=1.584, bire=0.0080	Terskite 
Biaxial (+), a=1.577, b=1.594, g=1.633, bire=0.0560, 2V(Calc)=70, 2V(Meas)=68.	Fedotovite 
Biaxial (?), b=1.577	Kolovratite 
Biaxial (-), a=1.576-1.579, b=1.581-1.585, g=1.584-1.586, bire=0.0070-0.0080	Sorensenite 
Biaxial (-), a=1.578, b=1.597, g=1.606, bire=0.0280, 2V(Calc)=68, 2V(Meas)=67.	Georgechaoite 
Biaxial (+), a=1.578, b=1.663, g=1.919, bire=0.3410	Kratochvilite 
Biaxial (-), a=1.578, b=1.587, g=1.595, bire=0.0170, 2V(Calc)=86, 2V(Meas)=86.15.	Leightonite 
Biaxial (-), a=1.578, b=1.592, g=1.598, bire=0.0200	Potassiccarpholite !
Biaxial (+), a=1.568-1.588, b=1.572-1.589, g=1.582-1.598, bire=0.0100-0.0140, 2V(Calc)=38-66, 2V(Meas)=25-35.  Dispersion r < v weak.	Wagnerite 
Biaxial (+), a=1.579, b=1.588, g=1.604, bire=0.0250, 2V(Calc)=76, 2V(Meas)=63-77.	Heidornite 
Biaxial (+), a=1.579, b=1.589, g=1.609, bire=0.0300, 2V(Calc)=72, 2V(Meas)=65-70.	Manganohornesite 
Biaxial (+), a=1.579, b=1.603, g=1.629, bire=0.0500, 2V(Calc)=90, 2V(Meas)=85.	Metavivianite 
Biaxial (+), a=1.571-1.588, b=1.571-1.589, g=1.576-1.599, bire=0.0050-0.0110, 2V(Calc)=0-36, 2V(Meas)=0-40.  Dispersion r < v.	Clinochlore 
Biaxial (+), a=1.58, b=1.599, g=1.605, bire=0.0250	Coeruleolactite 
Biaxial (-), a=1.58, b=1.588, g=1.593, bire=0.0130, 2V(Calc)=76, 2V(Meas)=74.  Dispersion r < v moderate.	Esperanzaite !
Biaxial (+), a=1.58, b=1.605, g=1.644, bire=0.0640	Euchlorine 
Biaxial (-), a=1.58, b=1.59, g=1.6, bire=0.0200, 2V(Calc)=88, 2V(Meas)=60-90.  Dispersion none.	Howlite 
Biaxial (-), a=1.58, b=1.605, g=1.605, bire=0.0250	Montdorite 
Biaxial (-), a=1.58, b=1.625, g=1.625, bire=0.0450	Niksergievite !
Biaxial (+), a=1.58, b=1.583, g=1.602, bire=0.0220, 2V(Calc)=44, 2V(Meas)=24.  Dispersion r < v moderate.	Nordstrandite 
Biaxial (+), a=1.58, b=1.585, g=1.59, bire=0.0100, 2V(Calc)=88, 2V(Meas)=40-50.	Whiteite-(CaFeMg) 
Biaxial (+), a=1.58, b=1.584, g=1.591, bire=0.0110, 2V(Calc)=76, 2V(Meas)=74-81.	Whiteite-(CaMnMg) 
Biaxial (+), a=1.58, b=1.584-1.585, g=1.59-1.591, bire=0.0100-0.0110	Whiteite-(MnFeMg) 
Biaxial (-), a=1.578-1.583, b=1.578-1.622, g=1.615-1.623, bire=0.0370-0.0400, 2V(Calc)=0-16, 2V(Meas)=4.	Minnesotaite 
Biaxial (-), a=1.581, b=1.5958, g=1.6008, bire=0.0198, 2V(Calc)=58, 2V(Meas)=68-72.	Balipholite 
Biaxial (-), a=1.581, b=1.715, g=1.715, bire=0.1340, 2V(Calc)=0, 2V(Meas)=5.  Dispersion dispersion not observed.	Kukharenkoite-(La) !
Biaxial (+), a=1.581, b=1.6, g=1.631, bire=0.0500	Pakhomovskyite !
Biaxial (+), a=1.581, b=1.586, g=1.596, bire=0.0150, 2V(Calc)=72, 2V(Meas)=70.  Dispersion r > v.	Scholzite 
Biaxial (-), a=1.581, b=1.59, g=1.591, bire=0.0100, 2V(Calc)=36, 2V(Meas)=40.	Tuscanite 
Biaxial (?), a=1.582, g=1.614,  bire=0.0320	Baileychlore 
Biaxial (+), a=1.578-1.586, b=1.579-1.586, g=1.583-1.593, bire=0.0050-0.0070, 2V(Calc)=0-54, 2V(Meas)=22-60.	Bavenite 
Biaxial (+), a=1.58-1.584, b=1.585-1.587, g=1.594-1.596, bire=0.0120-0.0140, 2V(Calc)=62-74, 2V(Meas)=86-90.  Dispersion none.	Celsian 
Biaxial (+), a=1.582, b=1.602, g=1.629, bire=0.0470, 2V(Calc)=84, 2V(Meas)=82.	Goldichite 
Biaxial (-), a=1.582, b=1.604, g=1.609, bire=0.0270, 2V(Calc)=50, 2V(Meas)=54.	Niahite 
Biaxial (-), a=1.582, b=1.625, g=1.625, bire=0.0430, 2V(Calc)=0, 2V(Meas)=4.	Siderophyllite 
Biaxial (-), a=1.581-1.583, b=1.584-1.589, g=1.591-1.601, bire=0.0100-0.0180, 2V(Calc)=68-72, 2V(Meas)=64-70.	Sudoite 
Biaxial (-), a=1.582, b=1.584, g=1.584, bire=0.0020, 2V(Calc)=0, 2V(Meas)=0.  Dispersion r > v weak.	Zektzerite 
Biaxial (?), b=1.583	Bayerite 
Biaxial (-), a=1.583, b=1.608, g=1.633, bire=0.0500, 2V(Calc)=88, 2V(Meas)=79.	Chudobaite 
Biaxial (-), a=1.583, b=1.669, g=1.712, bire=0.1290	Oswaldpeetersite !
Biaxial (-), a=1.583, b=1.589, g=1.594, bire=0.0110, 2V(Calc)=84, 2V(Meas)=77.  Dispersion none.	Pharmacolite 
Biaxial (+), a=1.583, b=1.585, g=1.595, bire=0.0120, 2V(Calc)=50, 2V(Meas)=0-5.  Dispersion small.	Xonotlite 
Biaxial (-), a=1.583-1.584, b=1.641-1.642, g=1.647-1.648, bire=0.0640, 2V(Calc)=34, 2V(Meas)=35.  Dispersion rSerpierite 
Biaxial (+), a=1.584, b=1.586, g=1.6, bire=0.0160, 2V(Calc)=42, 2V(Meas)=35.	Eakerite 
Biaxial (-), a=1.584, b=1.612, g=1.626, bire=0.0420, 2V(Calc)=68, 2V(Meas)=70.	Kimuraite-(Y) 
Biaxial (+), a=1.584, b=1.598, g=1.602, bire=0.0180	Millisite 
Biaxial (?), a=1.584, g=1.65,  bire=0.0660	Montetrisaite !
Biaxial (-), a=1.584, b=1.62, g=1.621, bire=0.0370, 2V(Calc)=18, 2V(Meas)=19.	Nissonite 
Biaxial (-), a=1.584, b=1.637, g=1.67, bire=0.0860, 2V(Calc)=74, 2V(Meas)=50.	Ushkovite 
Biaxial (-), a=1.585, b=1.649, g=1.66, bire=0.0750, 2V(Calc)=42, 2V(Meas)=39.	Devilline 
Biaxial (-), a=1.585, b=1.608, g=1.615, bire=0.0300, 2V(Calc)=56, 2V(Meas)=58.	Henmilite 
Biaxial (-), a=1.585, b=1.589, g=1.589, bire=0.0040	Kapustinite !
Biaxial (+), a=1.585, b=1.615, g=1.648, bire=0.0630	Khaidarkanite !
Biaxial (-), a=1.57-1.6, b=1.61, g=1.62, bire=0.0200-0.0500, 2V(Calc)=52-88, 2V(Meas)=81.5.	Montebrasite ?
Biaxial (-), a=1.585, b=1.604, g=1.612, bire=0.0270, 2V(Calc)=64, 2V(Meas)=65.	Nakauriite 
Biaxial (-), a=1.58-1.59, b=1.58-1.59, g=1.59-1.6, bire=0.0100, 2V(Calc)=0, 2V(Meas)=30-50.	Saliotite 
Biaxial (-), a=1.585, b=1.614, g=1.614, bire=0.0290, 2V(Calc)=0, 2V(Meas)=28.	Vimsite 
Biaxial (-), a=1.585, b=1.603, g=1.604, bire=0.0190, 2V(Calc)=26, 2V(Meas)=33.	Wightmanite 
Biaxial (-), a=1.585, b=1.598, g=1.603, bire=0.0180, 2V(Calc)=62, 2V(Meas)=-63.  Dispersion medium, r < v.	Zeravshanite !
Biaxial (+), a=1.586, b=1.592, g=1.614, bire=0.0280, 2V(Calc)=56, 2V(Meas)=55-56.  Dispersion relatively weak.	Colemanite 
Biaxial (-), a=1.586, b=1.62, g=1.63, bire=0.0440, 2V(Calc)=54, 2V(Meas)=50-56.	Heneuite 
Biaxial (-), a=1.586, b=1.645, g=1.65, bire=0.0640, 2V(Calc)=30, 2V(Meas)=32.  Dispersion r > v weak.	Orthoserpierite 
Biaxial (-), a=1.586, b=1.602, g=1.606, bire=0.0200	Spencerite 
Biaxial (+), a=1.587, b=1.59, g=1.597, bire=0.0100	Bultfonteinite 
Biaxial (+), a=1.587, b=1.589, g=1.594, bire=0.0070	Miserite 
Biaxial (+), a=1.587, b=1.588, g=1.603, bire=0.0160, 2V(Calc)=30, 2V(Meas)=25.  Dispersion r > v.	Parascholzite 
Biaxial (+), a=1.587, b=1.57, g=1.616, bire=0.0290	Tengerite-(Y) 
Biaxial (-), a=1.586-1.589, b=1.614-1.616, g=1.621-1.626, bire=0.0350-0.0370, 2V(Calc)=52-60, 2V(Meas)=61.	Caysichite-(Y) 
Biaxial (+), a=1.588, b=1.592, g=1.598, bire=0.0100, 2V(Calc)=80, 2V(Meas)=70.	Althausite 
Biaxial (+), a=1.588, b=1.617, g=1.655, bire=0.0670, 2V(Calc)=86, 2V(Meas)=82.  Dispersion relatively strong.	Cyanotrichite 
Biaxial (+), a=1.588, b=1.65, g=1.722, bire=0.1340, 2V(Calc)=90, 2V(Meas)=70-90.  Dispersion large.	Krausite 
Biaxial (-), a=1.588, b=1.681, g=1.69, bire=0.1020, 2V(Calc)=32, 2V(Meas)=32.	Moydite-(Y) 
Biaxial (-), a=1.588, b=1.601, g=1.61, bire=0.0220, 2V(Calc)=78, 2V(Meas)=82.	Paraumbite 
Biaxial (-), a=1.5884, b=1.6445, g=1.6455, bire=0.0571	Skorpionite !
Biaxial (-), a=1.543-1.634, b=1.576-1.745, g=1.576-1.745, bire=0.0330-0.1110, 2V(Calc)=0, 2V(Meas)=0-40.  Dispersion none.	Stilpnomelane 
Biaxial (-), a=1.589, b=1.645, g=1.659, bire=0.0700, 2V(Calc)=50, 2V(Meas)=52.	Campigliaite 
Biaxial (+), a=1.586-1.592, b=1.595-1.596, g=1.598-1.606, bire=0.0120-0.0140, 2V(Calc)=58-66, 2V(Meas)=63.  Dispersion r > v distinct.	Cuspidine 
Biaxial (-), a=1.589, b=1.632, g=1.634, bire=0.0450, 2V(Calc)=22, 2V(Meas)=24.	Karlite !
Biaxial (-), a=1.584-1.594, b=1.71-1.724, g=1.715-1.728, bire=0.1310-0.1340, 2V(Calc)=18-20, 2V(Meas)=16.  Dispersion r > v moderate.	Kukharenkoite-(Ce) !
Biaxial (+), a=1.589, b=1.617, g=1.644, bire=0.0550, 2V(Calc)=86, 2V(Meas)=87.	Nickelbischofite 
Biaxial (-), a=1.58-1.6, b=1.59-1.62, g=1.6-1.63, bire=0.0200-0.0300, 2V(Calc)=68-88, 2V(Meas)=50.	Amblygonite 
Biaxial (-), a=1.59, b=1.651, g=1.657, bire=0.0670, 2V(Calc)=32, 2V(Meas)=30.	Borcarite 
Biaxial (+), a=1.59, b=1.596, g=1.636, bire=0.0460, 2V(Calc)=44, 2V(Meas)=41-43.	Gravegliaite 
Biaxial (+), a=1.59, b=1.602, g=1.638, bire=0.0480, 2V(Calc)=62, 2V(Meas)=58.  Dispersion r > v.	Haidingerite 
Biaxial (+), a=1.59, b=1.594, g=1.614, bire=0.0240	Isokite 
Biaxial (-), a=1.59, b=1.608, g=1.611, bire=0.0210, 2V(Calc)=44, 2V(Meas)=42.	Lawsonbauerite 
Biaxial (-), a=1.59, b=1.74, g=1.744, bire=0.1540, 2V(Calc)=16, 2V(Meas)=18.  Dispersion r > v weak.	Leogangite !
Biaxial (-), a=1.59, b=1.6, g=1.61, bire=0.0200, 2V(Calc)=88, 2V(Meas)=50-60.	Magnesiocarpholite 
Biaxial (+), a=1.59, b=1.596, g=1.616, bire=0.0260, 2V(Calc)=58, 2V(Meas)=51.	Panasqueiraite 
Biaxial (-), a=1.59, b=1.61, g=1.619, bire=0.0290, 2V(Calc)=66, 2V(Meas)=65-67.	Vonbezingite 
Biaxial (-), a=1.591, b=1.605, g=1.614, bire=0.0230, 2V(Calc)=76, 2V(Meas)=73-81.  Dispersion none.	Bertrandite 
Biaxial (+), a=1.591, b=1.592, g=1.627, bire=0.0360	Catapleiite 
Biaxial (-), a=1.591, b=1.619, g=1.621, bire=0.0300, 2V(Calc)=28, 2V(Meas)=0-5.	Metauranospinite 
Biaxial (?), b=1.591	Nasledovite 
Biaxial (+), a=1.591, b=1.623, g=1.663, bire=0.0720, 2V(Calc)=86, 2V(Meas)=80.	Szomolnokite 
Biaxial (+), a=1.591, b=1.597, g=1.604, bire=0.0130, 2V(Calc)=86, 2V(Meas)=86.	Tinsleyite 
Biaxial (-), a=1.591-1.592, b=1.611-1.612, g=1.619-1.621, bire=0.0280-0.0290	Herderite 
Biaxial (-), a=1.592, g=1.615,  bire=0.0230, 2V(Meas)=30-80.	Pimelite ?
Biaxial (-), a=1.592, b=1.635, g=1.635, bire=0.0430	Shirozulite !
Biaxial (-), a=1.593, b=1.609, g=1.615, bire=0.0220	Protoanthophyllite !
Biaxial (+), a=1.593, b=1.621, g=1.666, bire=0.0730	Tinaksite 
Biaxial (-), a=1.593, b=1.684, g=1.698, bire=0.1050, 2V(Calc)=40, 2V(Meas)=30.  Dispersion r > v strong.	Yavapaiite 
Biaxial (+), a=1.593-1.594, b=1.595, g=1.599, bire=0.0050-0.0060, 2V(Calc)=54-72, 2V(Meas)=54-64.  Dispersion r < v weak.	Coesite 
Biaxial (-), a=1.592-1.595, b=1.624-1.625, g=1.625-1.627, bire=0.0320-0.0330, 2V(Calc)=18-28, 2V(Meas)=18-28.	Ephesite 
Biaxial (+/-), a=1.587-1.6, b=1.614, g=1.631-1.64, bire=0.0400-0.0440, 2V(Calc)=74, 2V(Meas)=70.	Monetite 
Biaxial (+), a=1.589-1.598, b=1.66-1.663, g=1.737-1.75, bire=0.1480-0.1520, 2V(Calc)=86-88, 2V(Meas)=87.  Dispersion r > v moderate.	Parabutlerite 
Biaxial (+), a=1.594, b=1.594, g=1.598, bire=0.0040	Foshagite 
Biaxial (+), a=1.594, b=1.603, g=1.615, bire=0.0210	Natromontebrasite ?
Biaxial (-), a=1.591-1.598, b=1.615-1.624, g=1.639-1.643, bire=0.0450-0.0480, 2V(Calc)=78-88, 2V(Meas)=80.  Dispersion r > v strong.	Paulkerrite 
Biaxial (-), a=1.5945, b=1.6069, g=1.6088, bire=0.0143, 2V(Calc)=42, 2V(Meas)=45.6.  Dispersion r > v strong.	Raadeite !
Biaxial (+), a=1.595, b=1.619, g=1.697, bire=0.1020, 2V(Calc)=62, 2V(Meas)=60.3.	Bazhenovite 
Biaxial (-), a=1.565-1.625, b=1.605-1.675, g=1.605-1.675, bire=0.0400-0.0500, 2V(Calc)=0, 2V(Meas)=0-25.  Dispersion r > v or r < v.	Biotite *
Biaxial (-), a=1.595, b=1.654, g=1.67, bire=0.0750, 2V(Calc)=52, 2V(Meas)=54.	Calciborite 
Biaxial (+), a=1.595, b=1.6, g=1.628, bire=0.0330	Cebollite 
Biaxial (-), a=1.595, b=1.648, g=1.656, bire=0.0610	Chopinite !
Biaxial (?), a=1.595, g=1.607,  bire=0.0120	Clairite 
Biaxial (+/-), a=1.595, b=1.605, g=1.626, bire=0.0310, 2V(Calc)=70, 2V(Meas)=90.	Fukalite 
Biaxial (-), a=1.595, b=1.601, g=1.604, bire=0.0090, 2V(Calc)=70, 2V(Meas)=70.  Dispersion r > v weak.	Hurlbutite 
Biaxial (?), a=1.595, b=1.598, g=1.61, bire=0.0150, 2V(Calc)=54, 2V(Meas)=48.	Kostylevite 
Biaxial (-), a=1.595, b=1.614, g=1.616, bire=0.0210, 2V(Calc)=34, 2V(Meas)=44.3.	Phosphophyllite 
Biaxial (-), a=1.595, b=1.614, g=1.614, bire=0.0190, 2V(Calc)=0, 2V(Meas)=0-55.	Semenovite 
Biaxial (-), a=1.565-1.625, b=1.605-1.675, g=1.605-1.675, bire=0.0400-0.0500, 2V(Calc)=0, 2V(Meas)=30.  Dispersion none.	Zinnwaldite 
Biaxial (-), a=1.588-1.603, b=1.654-1.659, g=1.68-1.682, bire=0.0790-0.0920, 2V(Calc)=62, 2V(Meas)=63-66.	Laueite 
Biaxial (+), a=1.595-1.596, b=1.598-1.6, g=1.631-1.632, bire=0.0360, 2V(Calc)=36-40, 2V(Meas)=29-43.  Dispersion r < v weak.	Petarasite 
Biaxial (+), a=1.596, b=1.604, g=1.628, bire=0.0320	Burgessite !
Biaxial (+), a=1.596, b=1.6, g=1.618, bire=0.0220, 2V(Calc)=52, 2V(Meas)=50.	Chiavennite 
Biaxial (-), a=1.596, b=1.597, g=1.597, bire=0.0010, 2V(Calc)=0, 2V(Meas)=0-5.	Emeleusite 
Biaxial (-), a=1.596, b=1.648, g=1.648, bire=0.0520	Fluorannite !
Biaxial (+), a=1.596, b=1.6, g=1.634, bire=0.0380, 2V(Calc)=40, 2V(Meas)=38.	Hannebachite 
Biaxial (-), a=1.596, b=1.639, g=1.67, bire=0.0740, 2V(Calc)=78, 2V(Meas)=70.	Suanite 
Biaxial (-), a=1.596, b=1.619, g=1.63, bire=0.0340, 2V(Calc)=68, 2V(Meas)=80.	Umbite 
Biaxial (-), a=1.596, b=1.603, g=1.606, bire=0.0100, 2V(Calc)=66, 2V(Meas)=~60.  Dispersion r > v strong.	Weeksite 
Biaxial (+), a=1.597, b=1.597, g=1.612, bire=0.0150, 2V(Calc)=0, 2V(Meas)=0.	Amesite 
Biaxial (-), a=1.597, g=1.603,  bire=0.0060	Kochsandorite !
Biaxial (-), a=1.597, b=1.77, g=1.775, bire=0.1780, 2V(Calc)=16, 2V(Meas)=20.  Dispersion r < v strong.	Larisaite !
Biaxial (-), a=1.597, b=1.609, g=1.615, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70.	Magbasite 
Biaxial (-), a=1.597, b=1.627, g=1.632, bire=0.0350, 2V(Calc)=42, 2V(Meas)=43.  Dispersion r > v.	Matioliite !
Biaxial (-), a=1.597, b=1.627, g=1.632, bire=0.0350	Pekovite !
Biaxial (-), a=1.597, b=1.616, g=1.624, bire=0.0270, 2V(Calc)=64, 2V(Meas)=66.	Sanbornite 
Biaxial (-), a=1.597, b=1.607, g=1.616, bire=0.0190, 2V(Calc)=86, 2V(Meas)=86.5.  Dispersion none.	Sphaerobertrandite !
Biaxial (-), a=1.5977, b=1.6259, g=1.6354, bire=0.0377	Christelite !
Biaxial (-), a=1.598, b=1.605, g=1.608, bire=0.0100, 2V(Calc)=66, 2V(Meas)=63-65.	Brianite 
Biaxial (?), a=1.598, g=1.614,  bire=0.0160	Kleemanite 
Biaxial (-), a=1.598, b=1.628, g=1.654, bire=0.0560	Lausenite 
Biaxial (+), a=1.598, b=1.604, g=1.626, bire=0.0280, 2V(Calc)=56, 2V(Meas)=59.	Metaschoderite 
Biaxial (-), a=1.598, b=1.601, g=1.602, bire=0.0040, 2V(Calc)=58, 2V(Meas)=83.	Zodacite 
Biaxial (+/-), a=1.593-1.604, b=1.665-1.674, g=1.731-1.741, bire=0.1370-0.1380	Butlerite 
Biaxial (+), a=1.599, b=1.61, g=1.696, bire=0.0970, 2V(Calc)=42, 2V(Meas)=38-41.  Dispersion 38.	Haineaultite !
Biaxial (-), a=1.599, b=1.607, g=1.607, bire=0.0080, 2V(Calc)=0, 2V(Meas)=45.	Lehnerite 
Biaxial (-), a=1.596-1.602, b=1.724-1.73, g=1.724-1.732, bire=0.1280-0.1300	Mcguinnessite 
Biaxial (?), a=1.6, g=1.62,  bire=0.0200	Aldzhanite *
Biaxial (+), a=1.6, b=1.65, g=1.722, bire=0.1220, 2V(Calc)=84, 2V(Meas)=84.	Bijvoetite-(Y) 
Biaxial (?), b=1.6	Ceruleite 
Biaxial (-), a=1.6, b=1.6, g=1.67, bire=0.0700, 2V(Calc)=0, 2V(Meas)=0-15.	Chamosite 
Biaxial (-), a=1.6, b=1.619, g=1.622, bire=0.0220	Ganterite !
Biaxial (-), a=1.6, b=1.633, g=1.64, bire=0.0400	Garrelsite-V 
Biaxial (+), a=1.6, b=1.605, g=1.613, bire=0.0130, 2V(Calc)=78, 2V(Meas)=50.	Hydrophilite ?
Biaxial (-), a=1.6, b=1.644, g=1.644, bire=0.0440, 2V(Calc)=0, 2V(Meas)=small.	Joliotite 
Biaxial (+), a=1.6, b=1.6, g=1.61, bire=0.0100, 2V(Calc)=0, 2V(Meas)=14-30.	Manandonite 
Biaxial (-), a=1.6, g=1.611,  bire=0.0110	Monsmedite ?
Biaxial (-), a=1.6, b=1.6, g=1.67, bire=0.0700, 2V(Calc)=0, 2V(Meas)=0-15.	Orthochamosite !
Biaxial (?), b=1.6	Planerite 
Biaxial (-), a=1.6, b=1.658, g=1.676, bire=0.0760	Polyphite-VII 
Biaxial (-), a=1.6, b=1.658, g=1.676, bire=0.0760, 2V(Calc)=56, 2V(Meas)=56.	Polyphite-VIII 
Biaxial (+), a=1.6, b=1.601, g=1.605, bire=0.0050	Riversideite 
Biaxial (-), a=1.59-1.61, b=1.63-1.685, g=1.64-1.704, bire=0.0500-0.0940	Roscoelite 
Biaxial (-), a=1.6, b=1.61, g=1.616, bire=0.0160, 2V(Calc)=74, 2V(Meas)=80.	Sainfeldite 
Biaxial (+), a=1.597-1.603, b=1.606-1.609, g=1.618-1.621, bire=0.0180-0.0210, 2V(Calc)=72-84, 2V(Meas)=74-78.	Scawtite 
Biaxial (-), a=1.53-1.67, b=1.53-1.73, g=1.55-1.74, bire=0.0200-0.0700, 2V(Calc)=0-42, 2V(Meas)=0-10.  Dispersion none.	Szaibelyite 
Biaxial (-), a=1.6, b=1.652, g=1.655, bire=0.0550, 2V(Calc)=26, 2V(Meas)=27.	Willemseite 
Biaxial (+), a=1.601, b=1.625, g=1.654, bire=0.0530, 2V(Calc)=86, 2V(Meas)=85.  Dispersion weak, r < v.	Altisite 
Biaxial (-), a=1.598-1.604, b=1.735, g=1.74-1.748, bire=0.1420-0.1440, 2V(Calc)=20-32, 2V(Meas)=5.	Cebaite-(Ce) 
Biaxial (-), a=1.601, b=1.63, g=1.66, bire=0.0590, 2V(Calc)=88, 2V(Meas)=89.	Geigerite 
Biaxial (-), a=1.59-1.612, b=1.609-1.643, g=1.61-1.644, bire=0.0200-0.0320, 2V(Calc)=20-24, 2V(Meas)=0-20.  Dispersion r > v.	Glauconite 
Biaxial (-), a=1.601, b=1.622, g=1.631, bire=0.0300, 2V(Calc)=64, 2V(Meas)=70.	Hydroxylherderite 
Biaxial (+/-), a=1.6-1.603, b=1.606-1.609, g=1.614-1.615, bire=0.0120-0.0140, 2V(Calc)=84-88, 2V(Meas)=83-90.  Dispersion r > v marked.	Latiumite 
Biaxial (+), a=1.602, b=1.613, g=1.649, bire=0.0470, 2V(Calc)=60, 2V(Meas)=54.	Anapaite 
Biaxial (+), a=1.602, b=1.609, g=1.621-1.623, bire=0.0190-0.0210, 2V(Calc)=72-76, 2V(Meas)=71-75.	Brazilianite 
Biaxial (-), a=1.602, b=1.716, g=1.75, bire=0.1480, 2V(Calc)=54, 2V(Meas)=30-40.	Dundasite 
Biaxial (-), a=1.602, b=1.607, g=1.611, bire=0.0090	Gerenite-(Y) !
Biaxial (-), a=1.602, b=1.636, g=1.639, bire=0.0370, 2V(Calc)=32, 2V(Meas)=24-32.  Dispersion strong, r < v.	Grandidierite 
Biaxial (-), a=1.602, b=1.628, g=1.632, bire=0.0300, 2V(Calc)=42, 2V(Meas)=42.	Metaswitzerite 
Biaxial (+), a=1.602, b=1.606, g=1.613, bire=0.0110	Oyelite 
Biaxial (+), a=1.594-1.61, b=1.603-1.614, g=1.631-1.642, bire=0.0320-0.0370, 2V(Calc)=42-60, 2V(Meas)=50-63.  Dispersion very weak, r > v.	Pectolite 
Biaxial (+), a=1.602, b=1.642, g=1.725, bire=0.1230, 2V(Calc)=74, 2V(Meas)=70.  Dispersion r > v medium.	Pushcharovskite !
Biaxial (?), a=1.602, g=1.658,  bire=0.0560	Svenekite !
Biaxial (-), a=1.55-1.655, b=1.717, g=1.765, bire=0.1100-0.2150	Zippeite 
Biaxial (?), a=1.603, b=1.61, g=1.617, bire=0.0140, 2V(Calc)=88, 2V(Meas)=90.	Bassetite 
Biaxial (-), a=1.603, b=1.69, g=1.71, bire=0.1070, 2V(Calc)=48, 2V(Meas)=50.	Fontanite 
Biaxial (+), a=1.603, b=1.608, g=1.616, bire=0.0130, 2V(Calc)=78, 2V(Meas)=70.  Dispersion r > v.	Lunokite 
Biaxial (-), a=1.602-1.604, b=1.647-1.65, g=1.649-1.654, bire=0.0470-0.0500, 2V(Calc)=22-32, 2V(Meas)=30.	Vitusite-(Ce) 
Biaxial (+), a=1.58-1.626, b=1.598-1.662, g=1.627-1.699, bire=0.0470-0.0730, 2V(Calc)=78-88, 2V(Meas)=63.5-83.5.  Dispersion none.	Vivianite 
Biaxial (-), a=1.604, g=1.638,  bire=0.0340	Decrespignyite-(Y) !
Biaxial (-), a=1.604, b=1.667, g=1.731, bire=0.1270, 2V(Calc)=86, 2V(Meas)=87.	Kamotoite-(Y) 
Biaxial (?), b=1.604	Tvedalite 
Biaxial (+), a=1.604, b=1.609, g=1.615, bire=0.0110	Uralborite 
Biaxial (?), b=1.605	Carlosturanite 
Biaxial (-), a=1.605, b=1.648, g=1.654, bire=0.0490	Chromceladonite !
Biaxial (-), a=1.605, b=1.61, g=1.612, bire=0.0070, 2V(Calc)=64, 2V(Meas)=60.  Dispersion strong, r < v.	Hillebrandite 
Biaxial (+), a=1.605, b=1.608, g=1.612, bire=0.0070, 2V(Calc)=82, 2V(Meas)=75.	Imandrite 
Biaxial (-), a=1.605, b=1.626, g=1.633, bire=0.0280, 2V(Calc)=58, 2V(Meas)=62.	Jimthompsonite 
Biaxial (-), a=1.605, b=1.696, g=1.752, bire=0.1470	Paratooite-(La) !
Biaxial (+), a=1.605, b=1.633, g=1.702, bire=0.0970, 2V(Calc)=68, 2V(Meas)=64.	Rokuhnite 
Biaxial (-), a=1.599-1.612, b=1.613-1.626, g=1.625-1.637, bire=0.0250-0.0260, 2V(Calc)=82-84, 2V(Meas)=88-80.  Dispersion r < v.	Tremolite 
Biaxial (-), a=1.6058, b=1.67, g=1.6245, bire=0.0187	Fluoro-edenite !
Biaxial (-), a=1.606, b=1.617, g=1.62, bire=0.0140, 2V(Calc)=54, 2V(Meas)=44-50.	Reinhardbraunsite 
Biaxial (-), a=1.602-1.61, b=1.73-1.737, g=1.74-1.753, bire=0.1380-0.1430	Seelite-1 
Biaxial (-), a=1.602-1.61, b=1.73-1.737, g=1.74-1.753, bire=0.1380-0.1430, 2V(Calc)=28-36, 2V(Meas)=30-41.	Seelite-2 
Biaxial (+), a=1.606, b=1.61, g=1.62, bire=0.0140, 2V(Calc)=66, 2V(Meas)=72.	Zanazziite 
Biaxial (+), a=1.594-1.619, b=1.596-1.622, g=1.604-1.631, bire=0.0100-0.0120, 2V(Calc)=54-62, 2V(Meas)=50-60.	Stanfieldite 
Biaxial (-), a=1.607, b=1.61, g=1.616, bire=0.0090, 2V(Calc)=72, 2V(Meas)=65.	Buchwaldite 
Biaxial (-), a=1.607, b=1.641, g=1.672, bire=0.0650, 2V(Calc)=84, 2V(Meas)=78.	Papagoite 
Biaxial (-), a=1.607, b=1.623, g=1.628, bire=0.0210	Vlasovite 
Biaxial (+), a=1.608, b=1.63, g=1.66, bire=0.0520, 2V(Calc)=84, 2V(Meas)=82.  Dispersion r < v moderate.	Shkatulkalite !
Biaxial (+), a=1.608, b=1.612, g=1.621, bire=0.0130, 2V(Calc)=68, 2V(Meas)=61-70.	Tuhualite 
Biaxial (-), a=1.6085, b=1.6375, g=1.65, bire=0.0415	Fabianite 
Biaxial (-), a=1.609, b=1.636, g=1.644, bire=0.0350, 2V(Calc)=56, 2V(Meas)=60.	Inesite 
Biaxial (-), a=1.599-1.619, b=1.642, g=1.661, bire=0.0420-0.0620, 2V(Calc)=64-82, 2V(Meas)=84.  Dispersion r > v strong.	Niedermayrite !
Biaxial (+), a=1.609, b=1.62, g=1.642, bire=0.0330, 2V(Calc)=72, 2V(Meas)=65.  Dispersion dispersion not observed.	Pertsevite !
Biaxial (+), a=1.609, b=1.613, g=1.619, bire=0.0100, 2V(Calc)=80, 2V(Meas)=69.5.	Stokesite 
Biaxial (-), a=1.61, b=1.65, g=1.65, bire=0.0400, 2V(Calc)=0, 2V(Meas)=~15.	Apachite 
Biaxial (-), a=1.61, b=1.628, g=1.63, bire=0.0200	Carpholite 
Biaxial (-), a=1.61, b=1.627, g=1.633, bire=0.0230, 2V(Calc)=60, 2V(Meas)=55-61.	Clinoholmquistite ?
Biaxial (-), a=1.61, b=1.63, g=1.633, bire=0.0230, 2V(Calc)=40, 2V(Meas)=65.	Clinojimthompsonite 
Biaxial (-), a=1.61, b=1.65, g=1.682, bire=0.0720, 2V(Calc)=80, 2V(Meas)=60.	Epistolite 
Biaxial (-), a=1.61, b=1.627, g=1.633, bire=0.0230	Fluoro-sodic-pedrizite !
Biaxial (+), a=1.61, b=1.61, g=1.611, bire=0.0010, 2V(Calc)=0, 2V(Meas)=40-45.	Foggite 
Biaxial (-), a=1.61, b=1.63, g=1.639, bire=0.0290, 2V(Calc)=66, 2V(Meas)=65.	Gatumbaite 
Biaxial (-), a=1.61, b=1.623, g=1.623, bire=0.0130	Metauranocircite 
Biaxial (-), a=1.61, b=1.62, g=1.623, bire=0.0130, 2V(Calc)=56, 2V(Meas)=30-50.	Suolunite 
Biaxial (+), a=1.61, b=1.66, g=1.74, bire=0.1300	Synchysite-(Nd) 
Biaxial (+), a=1.61, b=1.615, g=1.65, bire=0.0400, 2V(Calc)=44, 2V(Meas)=40.  Dispersion relatively strong.	Turquoise 
Biaxial (-), a=1.611, b=1.635, g=1.643, bire=0.0320, 2V(Calc)=58, 2V(Meas)=58.	Burangaite 
Biaxial (-), a=1.611, b=1.619, g=1.621, bire=0.0100	Cymrite 
Biaxial (+), a=1.611, b=1.616, g=1.633, bire=0.0220	Fluorocannilloite !
Biaxial (-), a=1.598-1.624, b=1.658-1.686, g=1.66-1.697, bire=0.0620-0.0730, 2V(Calc)=20-44, 2V(Meas)=2-5.  Dispersion r < v slight.	Hendricksite 
Biaxial (+), a=1.611, b=1.62, g=1.645, bire=0.0340	Metahaiweeite 
Biaxial (+), a=1.612, b=1.621, g=1.649, bire=0.0370, 2V(Calc)=60, 2V(Meas)=60.	Benyacarite 
Biaxial (+), a=1.612, b=1.627, g=1.705, bire=0.0930, 2V(Calc)=50, 2V(Meas)=40.  Dispersion r > v.	Chivruaiite !
Biaxial (-), a=1.612, b=1.652, g=1.675, bire=0.0630, 2V(Calc)=72, 2V(Meas)=67.  Dispersion none.	Liroconite 
Biaxial (-), b=1.612	Tamaite !
Biaxial (-), a=1.6124, b=1.674, g=1.7104, bire=0.0980, 2V(Calc)=72, 2V(Meas)=74.  Dispersion r < v.	Dickthomssenite !
Biaxial (-), a=1.613, b=1.62, g=1.626, bire=0.0130, 2V(Calc)=84, 2V(Meas)=60.  Dispersion dispersion not observed.	Atencioite !
Biaxial (?), a=1.602-1.624, b=1.632-1.65, g=1.632-1.65, bire=0.0260-0.0300	Bementite 
Biaxial (-), a=1.606-1.62, b=1.632-1.65, g=1.632-1.65, bire=0.0260-0.0300, 2V(Calc)=0, 2V(Meas)=0.  Dispersion weak.	Caryopilite 
Biaxial (+), b=1.613	Faustite 
Biaxial (-), a=1.613, b=1.625, g=1.634, bire=0.0210	Magnesiogedrite ?
Biaxial (-), a=1.613, b=1.63, g=1.645, bire=0.0320	Natroboltwoodite 
Biaxial (+), a=1.613, b=1.635, g=1.657, bire=0.0440	Sklodowskite 
Biaxial (-), a=1.614, b=1.63, g=1.635, bire=0.0210, 2V(Calc)=56, 2V(Meas)=58.	Ferrocarpholite 
Biaxial (+), a=1.614, b=1.617, g=1.636, bire=0.0220, 2V(Calc)=44, 2V(Meas)=46.  Dispersion none.	Hemimorphite 
Biaxial (+), a=1.614, b=1.625, g=1.637, bire=0.0230	Parahopeite 
Biaxial (-), a=1.614, b=1.646, g=1.651, bire=0.0370, 2V(Calc)=42, 2V(Meas)=33-42.  Dispersion r > v moderately strong.	Werdingite 
Biaxial (+), a=1.612-1.617, b=1.632-1.635, g=1.652-1.654, bire=0.0370-0.0400, 2V(Calc)=88-90, 2V(Meas)=85-90.  Dispersion r < v.	Tilleyite 
Biaxial (+), a=1.615, b=1.625, g=1.665, bire=0.0500, 2V(Calc)=56, 2V(Meas)=55.  Dispersion r < v strong.	Diadochite 
Biaxial (?), a=1.615	IMA2000-020 !
Biaxial (-), a=1.615, g=1.685,  bire=0.0700	Likasite 
Biaxial (-), a=1.615, b=1.635, g=1.638, bire=0.0230, 2V(Calc)=40, 2V(Meas)=27-37.  Dispersion anomalously biaxial.	Metalodevite 
Biaxial (-), a=1.6-1.63, g=1.635-1.65,  bire=0.0200-0.0350, 2V(Meas)=0-10.	Nepouite 
Biaxial (-), a=1.615, b=1.619, g=1.622, bire=0.0070	Remondite-(La) !
Biaxial (-), a=1.615, b=1.629, g=1.636, bire=0.0210, 2V(Calc)=70, 2V(Meas)=68.	Richterite 
Biaxial (-), a=1.615, b=1.66, g=1.7, bire=0.0850, 2V(Calc)=84, 2V(Meas)=82.  Dispersion r > v medium.	Yvonite !
Biaxial (-), a=1.616, g=1.622,  bire=0.0060	Barahonaite-(Al) !
Biaxial (+), a=1.616, b=1.63, g=1.677, bire=0.0610, 2V(Calc)=60, 2V(Meas)=55-60.  Dispersion strong, r > v.	Carbonatecyanotrichite 
Biaxial (-), a=1.616, b=1.629, g=1.64, bire=0.0240, 2V(Calc)=84, 2V(Meas)=70 -90.  Dispersion strong, r > v.	Krasnovite !
Biaxial (+), a=1.616, b=1.617, g=1.622-1.623, bire=0.0060-0.0070, 2V(Calc)=46-50, 2V(Meas)=35.	Kurumsakite 
Biaxial (-), a=1.595-1.638, b=1.625-1.648, g=1.627-1.65, bire=0.0120-0.0320, 2V(Calc)=28-46, 2V(Meas)=26-67.  Dispersion r < v.	Margarite 
Biaxial (-), a=1.608-1.625, b=1.64-1.65, g=1.646-1.65, bire=0.0250-0.0380	Rosenhahnite 
Biaxial (+), a=1.6169, b=1.6204, g=1.6336, bire=0.0167	Afwillite 
Biaxial (-), a=1.617, b=1.632, g=1.64, bire=0.0230, 2V(Calc)=70, 2V(Meas)=71.	Chesterite 
Biaxial (-), a=1.617, b=1.71, g=1.758, bire=0.1410, 2V(Calc)=68, 2V(Meas)=68.  Dispersion r > v weak.	Rabejacite 
Biaxial (+), a=1.592-1.643, b=1.602-1.655, g=1.619-1.675, bire=0.0270-0.0320, 2V(Calc)=76-78, 2V(Meas)=64-90.  Dispersion weak to moderate, r > v.	Chondrodite 
Biaxial (+), a=1.606-1.629, b=1.609-1.631, g=1.616-1.638, bire=0.0090-0.0100, 2V(Calc)=58-68, 2V(Meas)=48-68.  Dispersion noticeable, r > v.	Topaz 
Biaxial (+), a=1.6178, b=1.6184, g=1.6516, bire=0.0338, 2V(Calc)=16, 2V(Meas)=15.5.	Grossite 
Biaxial (?), a=1.618, g=1.642,  bire=0.0240, 2V(Meas)=large.	Fluckite 
Biaxial (+), a=1.618, b=1.629, g=1.632, bire=0.0140, 2V(Calc)=54, 2V(Meas)=50-70.  Dispersion r > v.	Fluoro-magnesio-arfvedsonite !
Biaxial (-), a=1.618, b=1.783, g=1.785, bire=0.1670, 2V(Calc)=10, 2V(Meas)=45.	Haynesite 
Biaxial (-), a=1.618, b=1.654, g=1.655, bire=0.0370, 2V(Calc)=18, 2V(Meas)=0-5.	Kivuite ?
Biaxial (-), a=1.618, b=1.658, g=1.672, bire=0.0540	Numanoite !
Biaxial (-), a=1.618, b=1.652, g=1.682, bire=0.0640, 2V(Calc)=84, 2V(Meas)=70-80.	Schoonerite 
Biaxial (-), a=1.618, b=1.635, g=1.65, bire=0.0320, 2V(Calc)=84, 2V(Meas)=45-70.	Segelerite 
Biaxial (-), a=1.618, b=1.642, g=1.652, bire=0.0340, 2V(Calc)=64, 2V(Meas)=68.  Dispersion r > v.	Souzalite 
Biaxial (-), a=1.619, b=1.669, g=1.673, bire=0.0540, 2V(Calc)=30, 2V(Meas)=31.  Dispersion r > v distinct.	Chromphyllite !
Biaxial (-), a=1.619, b=1.627, g=1.629, bire=0.0100, 2V(Calc)=52, 2V(Meas)=48.	Fedorovskite 
Biaxial (-), a=1.619, b=1.653, g=1.66, bire=0.0410, 2V(Calc)=48, 2V(Meas)=53.	Gormanite 
Biaxial (-), a=1.613-1.625, b=1.634-1.645, g=1.646-1.666, bire=0.0330-0.0410, 2V(Calc)=72-90, 2V(Meas)=49.	Holmquistite 
Biaxial (-), a=1.619, b=1.628-1.633, g=1.635, bire=0.0160, 2V(Calc)=40-82, 2V(Meas)=23.	Kinoshitalite 
Biaxial (-), a=1.619, b=1.67, g=1.72, bire=0.1010, 2V(Calc)=86, 2V(Meas)=75-80.	Strunzite 
Biaxial (-), a=1.619, b=1.639, g=1.643, bire=0.0240, 2V(Calc)=46, 2V(Meas)=49.	Trolleite 
Biaxial (-), a=1.619, b=1.631, g=1.641, bire=0.0220, 2V(Calc)=84, 2V(Meas)=85.  Dispersion r < v strong.	Wawayandaite 
Biaxial (-), a=1.619-1.62, b=1.63-1.64, g=1.642-1.644, bire=0.0230-0.0240, 2V(Calc)=46-90, 2V(Meas)=31-32.	Nordite-(La) 
Biaxial (-), a=1.62, b=1.661, g=1.665, bire=0.0450, 2V(Calc)=34, 2V(Meas)=34.	Althupite 
Biaxial (?), a=1.62, g=1.65,  bire=0.0300	Berthierine 
Biaxial (-), a=1.62, b=1.627, g=1.629, bire=0.0090, 2V(Calc)=56, 2V(Meas)=40.  Dispersion r < v strong.	Coutinhoite !
Biaxial (+), a=1.62, b=1.627, g=1.634, bire=0.0140, 2V(Calc)=88, 2V(Meas)=80.  Dispersion r < v or r>v, weak.	Footemineite !
Biaxial (-), a=1.62, b=1.624, g=1.624, bire=0.0040, 2V(Calc)=0, 2V(Meas)=15-20.	Fraipontite 
Biaxial (-), a=1.62, b=1.633, g=1.64, bire=0.0200, 2V(Calc)=72, 2V(Meas)=72.	Garrelsite-VIII 
Biaxial (+), a=1.62, b=1.639, g=1.686, bire=0.0660, 2V(Calc)=68, 2V(Meas)=65.	Krautite 
Biaxial (-), a=1.62, b=1.682, g=1.688, bire=0.0680, 2V(Calc)=32, 2V(Meas)=33.	Mundite 
Biaxial (-), a=1.619-1.621, b=1.63-1.64, g=1.642-1.655, bire=0.0230-0.0340, 2V(Calc)=82-90, 2V(Meas)=<30.	Nordite-(Ce) 
Biaxial (-), a=1.62, b=1.632, g=1.642, bire=0.0220	Parvo-mangano-edenite !
Biaxial (-), a=1.62, b=1.632, g=1.642, bire=0.0220	Parvo-manganotremolite !
Biaxial (?), a=1.61-1.63, b=1.616-1.635, 	Pitticite 
Biaxial (?), a=1.62, g=1.64,  bire=0.0200	Wycheproofite 
Biaxial (+), a=1.62, b=1.644, g=1.674, bire=0.0540, 2V(Calc)=86, 2V(Meas)=75.	Zircosulfate 
Biaxial (-), a=1.613-1.628, b=1.627-1.644, g=1.638-1.655, bire=0.0250-0.0270, 2V(Calc)=78-82, 2V(Meas)=84-73.  Dispersion r < v.	Actinolite 
Biaxial (-), a=1.604-1.637, b=1.631-1.667, g=1.642-1.677, bire=0.0380-0.0400, 2V(Calc)=58-64, 2V(Meas)=61-70.  Dispersion weak, r < v.	Lazulite 
Biaxial (-), a=1.612-1.63, b=1.653-1.658, g=1.66-1.681, bire=0.0480-0.0510	Stewartite 
Biaxial (+), a=1.621-1.622, b=1.623-1.624, g=1.63-1.632, bire=0.0090-0.0100, 2V(Calc)=54-58, 2V(Meas)=50-51.  Dispersion r < v.	Celestine 
Biaxial (-), a=1.606-1.637, b=1.615-1.65, g=1.627-1.655, bire=0.0180-0.0210, 2V(Calc)=62-84, 2V(Meas)=10-80.  Dispersion strong, r < v.	Glaucophane 
Biaxial (-), a=1.604-1.639, b=1.626-1.67, g=1.637-1.68, bire=0.0330-0.0410, 2V(Calc)=58-68, 2V(Meas)=62.  Dispersion r > v.	Scorzalite 
Biaxial (-), a=1.622, b=1.658, g=1.687, bire=0.0650, 2V(Calc)=82, 2V(Meas)=84.  Dispersion relatively weak.	Annabergite 
Biaxial (+), a=1.622, b=1.638, g=1.671, bire=0.0490, 2V(Calc)=72, 2V(Meas)=74.	Kottigite 
Biaxial (-), a=1.622, b=1.6332, g=1.638, bire=0.0160, 2V(Calc)=66, 2V(Meas)=66.3.	Liberite 
Biaxial (+), a=1.622, b=1.628, g=1.654, bire=0.0320, 2V(Calc)=52, 2V(Meas)=43.	Rittmannite 
Biaxial (-), a=1.622, g=1.634,  bire=0.0120	Ulrichite 
Biaxial (+), a=1.622-1.623, b=1.628-1.63, g=1.681-1.684, bire=0.0590-0.0610	Guildite 
Biaxial (+), a=1.623, b=1.631, g=1.657, bire=0.0340, 2V(Calc)=60, 2V(Meas)=10.	Churchite-(Y) 
Biaxial (-), a=1.623, b=1.636, g=1.642, bire=0.0190, 2V(Calc)=66, 2V(Meas)=60.  Dispersion weak, r > v.	Ferronordite-(Ce) !
Biaxial (+), a=1.623, b=1.636, g=1.642, bire=0.0190, 2V(Calc)=66, 2V(Meas)=60.  Dispersion weak, r > v.	Manganonordite-(Ce) !
Biaxial (+/-), a=1.623, b=1.636, g=1.649, bire=0.0260, 2V(Calc)=88, 2V(Meas)=89.7-90.	Petersenite-(Ce) 
Biaxial (+), a=1.623, b=1.625, g=1.634, bire=0.0110, 2V(Calc)=52, 2V(Meas)=large.  Dispersion r > v to r < v extreme.	Uranopilite 
Biaxial (+), a=1.61-1.637, b=1.615-1.647, g=1.632-1.67, bire=0.0220-0.0330, 2V(Calc)=58-68, 2V(Meas)=64-70.  Dispersion weak, r > v.	Prehnite 
Biaxial (-), a=1.624, b=1.635, g=1.654, bire=0.0300	Bakerite 
Biaxial (-), a=1.624, b=1.636, g=1.642, bire=0.0180	Bertossaite 
Biaxial (+), a=1.624, b=1.636, g=1.669, bire=0.0450	Birchite !
Biaxial (-), a=1.624, b=1.637, g=1.644, bire=0.0200, 2V(Calc)=72, 2V(Meas)=60.  Dispersion weak, r > v.	Ferronordite-(La) !
Biaxial (-), a=1.624, b=1.626, g=1.633, bire=0.0090, 2V(Calc)=58, 2V(Meas)=medium.  Dispersion Calculated index values.	Fluoronyboite !
Biaxial (-), a=1.624, b=1.634, g=1.638, bire=0.0140	Greifensteinite !
Biaxial (+), a=1.624, b=1.628, g=1.637, bire=0.0130, 2V(Calc)=68, 2V(Meas)=69.  Dispersion r < v moderate.	Kapitsaite-(Y) !
Biaxial (-), a=1.624, b=1.64, g=1.65, bire=0.0260, 2V(Calc)=76, 2V(Meas)=76.	Oursinite 
Biaxial (-), a=1.624, b=1.639, g=1.643, bire=0.0190	Roscherite 
Biaxial (-), a=1.624, b=1.652, g=1.652, bire=0.0280, 2V(Calc)=0, 2V(Meas)=0-4.  Dispersion dispersion not observed.	Suhailite !
Biaxial (-), a=1.606-1.644, b=1.63-1.662, g=1.63-1.663, bire=0.0190-0.0240	Aluminoceladonite !
Biaxial (-), a=1.625, b=1.7, g=1.735, bire=0.1100, 2V(Calc)=66, 2V(Meas)=66.	Ancylite-(Ce) 
Biaxial (-), a=1.606-1.644, b=1.63-1.662, g=1.63-1.663, bire=0.0190-0.0240, 2V(Calc)=0-26, 2V(Meas)=small.	Celadonite 
Biaxial (-), a=1.612-1.638, b=1.625-1.652, g=1.63-1.654, bire=0.0160-0.0180, 2V(Calc)=40-62, 2V(Meas)=80.	Eckermannite 
Biaxial (?), b=1.625	Ferroaluminoceladonite !
Biaxial (+), a=1.607-1.643, b=1.619-1.653, g=1.639-1.675, bire=0.0320, 2V(Calc)=70-78, 2V(Meas)=68-81.  Dispersion weak, r > v.	Humite 
Biaxial (-), a=1.625, b=1.641, g=1.643, bire=0.0180, 2V(Calc)=38, 2V(Meas)=40.	Jeffreyite 
Biaxial (-), a=1.625, b=1.68, g=1.706, bire=0.0810, 2V(Calc)=66, 2V(Meas)=57.	Posnjakite 
Biaxial (+), b=1.625	Smolianinovite 
Biaxial (+), a=1.626, b=1.646, g=1.682, bire=0.0560, 2V(Calc)=76, 2V(Meas)=75-77.	Camerolaite 
Biaxial (-), a=1.626, b=1.653-1.654, g=1.67, bire=0.0440, 2V(Calc)=72-74, 2V(Meas)=74.  Dispersion none.	Datolite 
Biaxial (?), b=1.626	Metazellerite 
Biaxial (+), a=1.626, b=1.671, g=1.699, bire=0.0730, 2V(Calc)=74, 2V(Meas)=75.	Poitevinite 
Biaxial (+), a=1.626, b=1.65, g=1.686, bire=0.0600, 2V(Calc)=80, 2V(Meas)=80.	Pseudolaueite 
Biaxial (+), a=1.622-1.631, b=1.624-1.649, g=1.642-1.663, bire=0.0200-0.0320, 2V(Calc)=38-82, 2V(Meas)=30-68.  Dispersion r < v.	Mansfieldite 
Biaxial (+), a=1.627, b=1.634, g=1.649, bire=0.0220	Boromullite !
Biaxial (-), a=1.627, b=1.634, g=1.639, bire=0.0120, 2V(Calc)=80, 2V(Meas)=80.1.	Burpalite 
Biaxial (-), a=1.627, b=1.635, g=1.641, bire=0.0140, 2V(Calc)=80, 2V(Meas)=66.  Dispersion r << v extreme.	Fluoro-alumino-magnesiotaramite !
Biaxial (-), a=1.627, b=1.699, g=1.769, bire=0.1420	Jacquesdietrichite !
Biaxial (-), a=1.627, b=1.642, g=1.658, bire=0.0310, 2V(Calc)=90, 2V(Meas)=90.	Kaluginite *
Biaxial (-), a=1.627, b=1.667, g=1.693, bire=0.0660, 2V(Calc)=76, 2V(Meas)=75-76.	Nafertisite !
Biaxial (-), a=1.627, b=1.642, g=1.644, bire=0.0170, 2V(Calc)=38, 2V(Meas)=20.	Palermoite 
Biaxial (-), a=1.627, b=1.686, g=1.69, bire=0.0630, 2V(Calc)=28, 2V(Meas)=25-33.  Dispersion r < v strong.	Sobolevite 
Biaxial (+), a=1.606-1.649, b=1.617-1.66, g=1.631-1.672, bire=0.0230-0.0250, 2V(Calc)=84-90, 2V(Meas)=52-83.  Dispersion weak to distinct, r > v.	Edenite 
Biaxial (+), a=1.626-1.629, b=1.662-1.663, g=1.699-1.701, bire=0.0720-0.0730, 2V(Calc)=88-90, 2V(Meas)=85-90.  Dispersion none.	Erythrite 
Biaxial (-), a=1.625-1.631, b=1.69, g=1.691-1.697, bire=0.0660, 2V(Calc)=12-36, 2V(Meas)=0-25.	Annite 
Biaxial (+), a=1.628, b=1.631, g=1.656, bire=0.0280, 2V(Calc)=40, 2V(Meas)=39.	Fahleite 
Biaxial (-), a=1.628, b=1.646, g=1.651, bire=0.0230	Ferroholmquistite 
Biaxial (-), a=1.628, b=1.682, g=1.723, bire=0.0950, 2V(Calc)=78, 2V(Meas)=80.	Ferrostrunzite 
Biaxial (-), a=1.628, b=1.66, g=1.705, bire=0.0770	Parasymplesite 
Biaxial (+), a=1.628, b=1.635, g=1.698, bire=0.0700, 2V(Calc)=38, 2V(Meas)=38.	Sarmientite 
Biaxial (-), a=1.629, b=1.682, g=1.691, bire=0.0620, 2V(Calc)=42, 2V(Meas)=41.	Artroeite 
Biaxial (+), a=1.629, b=1.64, g=1.654, bire=0.0250, 2V(Calc)=84, 2V(Meas)=81.8.  Dispersion very weak, r > v.	Boralsilite !
Biaxial (-), a=1.629, b=1.677, g=1.679, bire=0.0500, 2V(Calc)=22, 2V(Meas)=5-23.  Dispersion r > v.	Sampleite 
Biaxial (+), a=1.618-1.64, b=1.622-1.658, g=1.658-1.695, bire=0.0400-0.0550, 2V(Calc)=38-72, 2V(Meas)=38.5.  Dispersion r < v weak to strong.	Veszelyite 
Biaxial (-), a=1.629, b=1.643, g=1.65, bire=0.0210, 2V(Calc)=70, 2V(Meas)=64.  Dispersion r > v strong.	Winchite 
Biaxial (+), a=1.627-1.632, b=1.659-1.662, g=1.725-1.729, bire=0.0970-0.0980, 2V(Calc)=70-74, 2V(Meas)=72-73.	Lindackerite 
Biaxial (+), b=1.63	Aheylite 
Biaxial (+/-), a=1.63, b=1.633, g=1.636, bire=0.0060, 2V(Calc)=88, 2V(Meas)=88-90.  Dispersion relatively strong.	Danburite 
Biaxial (?), b=1.63	Dwornikite 
Biaxial (?), a=1.63, b=1.66, g=1.66, bire=0.0300	Friedelite 
Biaxial (+), a=1.63, b=1.636, g=1.664, bire=0.0340, 2V(Calc)=52, 2V(Meas)=35.	Hilgardite 
Biaxial (-), a=1.63, b=1.642, g=1.75, bire=0.1200, 2V(Calc)=40, 2V(Meas)=40.  Dispersion relatively strong.	Hydrozincite 
Biaxial (-), a=1.63, b=1.69, g=1.738, bire=0.1080, 2V(Calc)=80, 2V(Meas)=80.	Natrozippeite 
Biaxial (+), a=1.63, b=1.644, g=1.675, bire=0.0450	Odintsovite 
Biaxial (-), a=1.63, b=1.64, g=1.65, bire=0.0200, 2V(Calc)=88, 2V(Meas)=63.  Dispersion r > v.	Pargasite 
Biaxial (-), a=1.63, b=1.678, g=1.697, bire=0.0670, 2V(Calc)=62, 2V(Meas)=62.	Quadruphite-VII 
Biaxial (-), a=1.63, b=1.678, g=1.697, bire=0.0670	Quadruphite-VIII 
Biaxial (?), a=1.63, g=1.66,  bire=0.0300	Sieleckiite 
Biaxial (-), a=1.63, b=1.637, g=1.64, bire=0.0100	Ternesite !
Biaxial (+), a=1.63, g=1.64,  bire=0.0100, 2V(Meas)=high.	Widgiemoolthalite 
Biaxial (-), a=1.615-1.646, b=1.627-1.659, g=1.629-1.662, bire=0.0140-0.0160, 2V(Calc)=44-50, 2V(Meas)=40.  Dispersion r > v distinct.	Wollastonite-1A 
Biaxial (-), a=1.615-1.646, b=1.627-1.659, g=1.629-1.662, bire=0.0140-0.0160, 2V(Calc)=44-50, 2V(Meas)=40.  Dispersion r > v distinct.	Wollastonite-2M *
Biaxial (-), a=1.615-1.646, b=1.627-1.659, g=1.629-1.662, bire=0.0140-0.0160, 2V(Calc)=44-50, 2V(Meas)=40.  Dispersion r > v distinct.	Wollastonite-3A-4A-5A-7A *
Biaxial (-), a=1.631, b=1.641, g=1.647, bire=0.0160	Eveslogite !
Biaxial (+), a=1.631, b=1.641, g=1.664, bire=0.0330, 2V(Calc)=68, 2V(Meas)=70.  Dispersion weak.	Hydroxylclinohumite !
Biaxial (-), a=1.631, b=1.654, g=1.656, bire=0.0250, 2V(Calc)=32, 2V(Meas)=31.5.  Dispersion strong, r >> v.	Ominelite !
Biaxial (?), a=1.631, b=1.632, g=1.64, bire=0.0090, 2V(Calc)=40, 2V(Meas)=40.  Dispersion r < v strong.	Picropharmacolite 
Biaxial (+), a=1.631, b=1.643, g=1.695, bire=0.0640	Ransomite 
Biaxial (+), a=1.632, b=1.65, g=1.68, bire=0.0480, 2V(Calc)=78, 2V(Meas)=60-70.	Arupite 
Biaxial (+), a=1.632, b=1.64, g=1.688, bire=0.0560, 2V(Calc)=46, 2V(Meas)=44.	Chaidamuite 
Biaxial (+), a=1.632, b=1.642, g=1.657, bire=0.0250	Collinsite 
Biaxial (-), a=1.632, b=1.669, g=1.671, bire=0.0390, 2V(Calc)=24, 2V(Meas)=25.  Dispersion very strong, r > v.	Jahnsite-(NaFeMg) !
Biaxial (+), a=1.632, b=1.652, g=1.693, bire=0.0610, 2V(Calc)=72, 2V(Meas)=70.	Koritnigite 
Biaxial (+), a=1.632, b=1.633, g=1.638, bire=0.0060, 2V(Calc)=50, 2V(Meas)=40-48.	Remondite-(Ce) 
Biaxial (+), a=1.632, b=1.634, g=1.64, bire=0.0080, 2V(Calc)=62, 2V(Meas)=55-60.  Dispersion weak to distinct, r > v.	Trabzonite 
Biaxial (-), a=1.632, b=1.635-1.636, g=1.646, bire=0.0140, 2V(Calc)=56-66, 2V(Meas)=60.	Zykaite 
Biaxial (+), a=1.633, g=1.72,  bire=0.0870	Sharpite 
Biaxial (-), a=1.628-1.639, b=1.648-1.664, g=1.657-1.671, bire=0.0290-0.0320, 2V(Calc)=54-66, 2V(Meas)=50.  Dispersion strong, r < v.	Eosphorite 
Biaxial (-), a=1.634, b=1.673, g=1.685, bire=0.0510, 2V(Calc)=56, 2V(Meas)=45.	Durangite 
Biaxial (+), a=1.634, b=1.642, g=1.654, bire=0.0200, 2V(Calc)=80, 2V(Meas)=68.  Dispersion r > v weak.	Fluoropargasite !
Biaxial (+), a=1.634, g=1.642,  bire=0.0080	Irhtemite 
Biaxial (+), a=1.63-1.638, b=1.644-1.651, g=1.652-1.665, bire=0.0220-0.0270	Manganocummingtonite 
Biaxial (+), a=1.634, b=1.64, g=1.656, bire=0.0220, 2V(Calc)=64, 2V(Meas)=63-65.	Poldervaartite 
Biaxial (-), a=1.629-1.64, b=1.633-1.644, g=1.638-1.65, bire=0.0090-0.0100, 2V(Calc)=80-84, 2V(Meas)=48-68.  Dispersion r > v.	Andalusite 
Biaxial (?), a=1.635, b=1.65, 	Brianyoungite 
Biaxial (?), b=1.635	Brindleyite 
Biaxial (-), a=1.635, b=1.725, g=1.75, bire=0.1150	Galgenbergite-(Ce) !
Biaxial (+), a=1.635, b=1.65, g=1.669, bire=0.0340	Hillite !
Biaxial (-), a=1.635, g=1.642,  bire=0.0070, 2V(Meas)=26.	Killalaite 
Biaxial (-), a=1.635, b=1.681, g=1.698, bire=0.0630, 2V(Calc)=60, 2V(Meas)=66.  Dispersion r > v.	Kurchatovite 
Biaxial (-), a=1.635, b=1.675, g=1.68, bire=0.0450, 2V(Calc)=38, 2V(Meas)=37.	Ramsbeckite 
Biaxial (-), a=1.635, b=1.668, g=1.702, bire=0.0670, 2V(Calc)=88, 2V(Meas)=87.	Symplesite 
Biaxial (+), a=1.634-1.637, b=1.6355-1.638, g=1.646-1.648, bire=0.0110-0.0120, 2V(Calc)=36-42, 2V(Meas)=36-40.  Dispersion weak, r < v.	Barite 
Biaxial (+), a=1.634-1.637, b=1.6355-1.638, g=1.646-1.648, bire=0.0110-0.0120, 2V(Calc)=36-42, 2V(Meas)=36-40.  Dispersion weak, r < v.	Radiobarite 
Biaxial (+), a=1.598-1.674, b=1.605-1.685, g=1.615-1.697, bire=0.0170-0.0230, 2V(Calc)=82-90, 2V(Meas)=57-90.  Dispersion r > v or r < v.	Anthophyllite 
Biaxial (+), a=1.636, b=1.687, g=1.785, bire=0.1490, 2V(Calc)=76, 2V(Meas)=74-75.	Norrishite 
Biaxial (-), a=1.637, b=1.643, g=1.648, bire=0.0110, 2V(Calc)=84, 2V(Meas)=82-84.  Dispersion weak, r > v.	Koashvite 
Biaxial (+), a=1.637, b=1.638, g=1.675, bire=0.0380, 2V(Calc)=20, 2V(Meas)=<10.  Dispersion dispersion not observed.	Kurgantaite !
Biaxial (+), a=1.637, b=1.648, g=1.676, bire=0.0390, 2V(Calc)=66, 2V(Meas)=64.  Dispersion relatively weak.	Loseyite 
Biaxial (-), a=1.637, b=1.647, g=1.647, bire=0.0100, 2V(Calc)=0, 2V(Meas)=15.	Nimite 
Biaxial (+), a=1.637, b=1.65, g=1.67, bire=0.0330, 2V(Calc)=80, 2V(Meas)=46.	Tyretskite 
Biaxial (-), a=1.637, b=1.664, g=1.692, bire=0.0550	Wilhelmvierlingite 
Biaxial (-), a=1.637, b=1.682, g=1.694, bire=0.0570, 2V(Calc)=52, 2V(Meas)=53.	Wroewolfeite 
Biaxial (+), a=1.636-1.639, b=1.651-1.656, g=1.68-1.683, bire=0.0440	Vuonnemite 
Biaxial (+), a=1.636-1.64, b=1.644-1.65, g=1.654-1.66, bire=0.0180-0.0200, 2V(Calc)=86-88, 2V(Meas)=86.  Dispersion relatively weak.	Fairfieldite 
Biaxial (-), a=1.638, b=1.665, g=1.676, bire=0.0380, 2V(Calc)=64, 2V(Meas)=68.	Kinoite 
Biaxial (-), a=1.638, b=1.666, g=1.682, bire=0.0440, 2V(Calc)=72, 2V(Meas)=73.	Lepersonnite-(Gd) 
Biaxial (+/-), a=1.638, b=1.651, g=1.665, bire=0.0270	Manganogrunerite 
Biaxial (+), a=1.639, b=1.648, g=1.665, bire=0.0260, 2V(Calc)=74, 2V(Meas)=75.  Dispersion r > v medium.	Rudenkoite !
Biaxial (+), a=1.639, b=1.665, g=1.704, bire=0.0650, 2V(Calc)=82, 2V(Meas)=80.	Triangulite 
Biaxial (-), a=1.638-1.64, b=1.658-1.662, g=1.664-1.667, bire=0.0260-0.0270, 2V(Calc)=50-56, 2V(Meas)=54.13.	Vayrynenite 
Biaxial (+), a=1.64, b=1.668, g=1.731, bire=0.0910, 2V(Calc)=70, 2V(Meas)=70.  Dispersion r < v moderate.	Ancylite-(La) !
Biaxial (-), a=1.64, b=1.664, g=1.675, bire=0.0350, 2V(Calc)=66, 2V(Meas)=67.	Cyanophyllite 
Biaxial (-), a=1.64, g=1.653,  bire=0.0130, 2V(Meas)=60.	Ferrobustamite 
Biaxial (?), b=1.64	Ferroceladonite !
Biaxial (+), a=1.64, b=1.65, g=1.66, bire=0.0200, 2V(Calc)=88, 2V(Meas)=80.	Hellandite-(Y) 
Biaxial (+), a=1.64, b=1.658, g=1.67, bire=0.0300	Jahnsite-(CaMnMg) 
Biaxial (+), a=1.64, b=1.642, g=1.647, bire=0.0070, 2V(Calc)=66, 2V(Meas)=50.	Juanite 
Biaxial (-), a=1.64, b=1.652, g=1.652, bire=0.0120, 2V(Calc)=0, 2V(Meas)=0.	Malhmoodite 
Biaxial (+), a=1.64, b=1.658, g=1.76, bire=0.1200, 2V(Calc)=48, 2V(Meas)=47.7.	Metastudtite 
Biaxial (+), a=1.63-1.65, b=1.65-1.67, g=1.67-1.69, bire=0.0400, 2V(Calc)=88, 2V(Meas)=46-98.  Dispersion relatively weak.	Olivine *
Biaxial (+), a=1.64, b=1.646, g=1.675, bire=0.0350, 2V(Calc)=50, 2V(Meas)=50.	Penkvilksite 
Biaxial (-), a=1.64, b=1.692, g=1.694, bire=0.0540, 2V(Calc)=20, 2V(Meas)=10-15.	Richelsdorfite 
Biaxial (+), a=1.64, b=1.64, g=1.66, bire=0.0200	Roeblingite 
Biaxial (+), a=1.64, b=1.663, g=1.665, bire=0.0250	Seamanite 
Biaxial (-), a=1.64, b=1.69, g=1.69, bire=0.0500, 2V(Calc)=0, 2V(Meas)=small.	Shubnikovite 
Biaxial (-), a=1.64, b=1.661, g=1.663, bire=0.0230, 2V(Calc)=32, 2V(Meas)=30.	Swamboite 
Biaxial (-), a=1.64, b=1.66, g=1.675, bire=0.0350, 2V(Calc)=80, 2V(Meas)=82.733.  Dispersion r < v.	Tilasite 
Biaxial (+), a=1.64-1.641, b=1.644, g=1.65, bire=0.0090-0.0100, 2V(Calc)=72-80, 2V(Meas)=64.	Rankinite 
Biaxial (-), a=1.64-1.641, b=1.674-1.676, g=1.679-1.681, bire=0.0390-0.0400	Spurrite 
Biaxial (-), a=1.641, b=1.659, g=1.662, bire=0.0210, 2V(Calc)=44, 2V(Meas)=42.	Ferroglaucophane 
Biaxial (+), a=1.641, b=1.66, g=1.682, bire=0.0410	Jonesite 
Biaxial (+), a=1.641, b=1.649, g=1.661, bire=0.0200, 2V(Calc)=80, 2V(Meas)=60.	Magniotriplite ?
Biaxial (-), a=1.64-1.643, b=1.686-1.691, g=1.702-1.704, bire=0.0610-0.0620, 2V(Calc)=52-58, 2V(Meas)=11-12.	Chernykhite 
Biaxial (-), a=1.64-1.643, b=1.667-1.67, g=1.667-1.67, bire=0.0270	Mcgillite 
Biaxial (-), a=1.642, b=1.644, g=1.644, bire=0.0020	Attikaite !
Biaxial (-), a=1.642, b=1.647, g=1.662, bire=0.0200, 2V(Calc)=62, 2V(Meas)=61.  Dispersion not discernible.	Fluoro-magnesiohastingsite !
Biaxial (+), a=1.642, b=1.647, g=1.672, bire=0.0300, 2V(Calc)=50, 2V(Meas)=43.6.	Korzhinskite 
Biaxial (+), a=1.642, b=1.645, g=1.654, bire=0.0120, 2V(Calc)=62, 2V(Meas)=52.	Shannonite !
Biaxial (-), a=1.642-1.644, b=1.674-1.675, g=1.699-1.704, bire=0.0570-0.0600, 2V(Calc)=80-86, 2V(Meas)=82-88.	Clinokurchatovite 
Biaxial (-), a=1.643, b=1.659, g=1.671, bire=0.0280, 2V(Calc)=80, 2V(Meas)=80-81.	Jahnsite-(CaMnMn) 
Biaxial (-), a=1.643, b=1.657, g=1.67, bire=0.0270, 2V(Calc)=86, 2V(Meas)=81.  Dispersion dispersion not observed.	Obertiite !
Biaxial (+), a=1.643, b=1.645, g=1.649, bire=0.0060, 2V(Calc)=72, 2V(Meas)=47.  Dispersion very strong, r > v.	Pellyite 
Biaxial (-), a=1.643, b=1.664, g=1.67, bire=0.0270, 2V(Calc)=54, 2V(Meas)=56.	Ranunculite 
Biaxial (-), a=1.643, b=1.666, g=1.669, bire=0.0260, 2V(Calc)=38, 2V(Meas)=32-45.  Dispersion relatively strong.	Uranophane 
Biaxial (-), a=1.644, b=1.719, g=1.721, bire=0.0770, 2V(Calc)=16, 2V(Meas)=12-18.	Holdawayite 
Biaxial (+), a=1.644, b=1.653, g=1.68, bire=0.0360, 2V(Calc)=62, 2V(Meas)=20-35.	Messelite 
Biaxial (-), a=1.644, b=1.67, g=1.688, bire=0.0440, 2V(Calc)=78, 2V(Meas)=82.	Weilite 
Biaxial (?), a=1.644, g=1.66,  bire=0.0160, 2V(Meas)=46-76.	Yuksporite 
Biaxial (?), a=1.64-1.65, g=1.67,  bire=0.0200-0.0300	Cassidyite 
Biaxial (?), a=1.645, b=1.656, g=1.656, bire=0.0110	Koninckite 
Biaxial (-), a=1.645, b=1.66, g=1.666, bire=0.0210, 2V(Calc)=64, 2V(Meas)=59.9-64.	Lithiomarsturite 
Biaxial (+), a=1.645, b=1.66, g=1.715, bire=0.0700	Plancheite 
Biaxial (-), a=1.643-1.648, b=1.655-1.662, g=1.655-1.663, bire=0.0120-0.0150, 2V(Calc)=0-28, 2V(Meas)=2-40.  Dispersion none.	Clintonite 
Biaxial (+), a=1.646, b=1.652, g=1.661, bire=0.0150, 2V(Calc)=80, 2V(Meas)=80.	Boehmite 
Biaxial (+), a=1.646, b=1.668, g=1.705, bire=0.0590, 2V(Calc)=78, 2V(Meas)=78.	Cobaltkoritnigite 
Biaxial (+), a=1.646, b=1.685, g=1.745, bire=0.0990, 2V(Calc)=82, 2V(Meas)=75.	Eriochalcite 
Biaxial (-), a=1.646, b=1.664, g=1.664, bire=0.0180, 2V(Calc)=0, 2V(Meas)=0.	Gonyerite 
Biaxial (+), a=1.646, b=1.654, g=1.763, bire=0.1170	Korobitsynite !
Biaxial (+), a=1.643-1.649, b=1.657-1.664, g=1.681-1.691, bire=0.0380-0.0420, 2V(Calc)=76, 2V(Meas)=77.  Dispersion weak, r > v.	Leucosphenite 
Biaxial (+), a=1.646, b=1.649, g=1.658, bire=0.0120, 2V(Calc)=62, 2V(Meas)=43-87.  Dispersion r > v strong.	Mosandrite 
Biaxial (+), a=1.633-1.659, b=1.642-1.686, g=1.738-1.785, bire=0.1050-0.1260, 2V(Calc)=36-58, 2V(Meas)=31-45.	Nenadkevichite !
Biaxial (-), a=1.646, b=1.661, g=1.661, bire=0.0150, 2V(Calc)=0, 2V(Meas)=0.	Pennantite 
Biaxial (-), a=1.646, b=1.658, g=1.66, bire=0.0140, 2V(Calc)=44, 2V(Meas)=28.	Roweite 
Biaxial (+), a=1.645-1.648, b=1.65-1.655, g=1.655-1.667, bire=0.0100-0.0190, 2V(Calc)=76-88, 2V(Meas)=70-85.  Dispersion r < v weak.	Samuelsonite 
Biaxial (+), a=1.647, b=1.674, g=1.704, bire=0.0570	George-ericksenite !
Biaxial (+), a=1.647, b=1.653, g=1.755, bire=0.1080, 2V(Calc)=30, 2V(Meas)=25.  Dispersion dispersion not observed.	Gjerdingenite-Na !
Biaxial (-), a=1.647, b=1.654, g=1.66, bire=0.0130, 2V(Calc)=84, 2V(Meas)=75.  Dispersion r < v very strong.	Hureaulite 
Biaxial (+), a=1.647, b=1.649, g=1.65, bire=0.0030, 2V(Calc)=70, 2V(Meas)=60.  Dispersion r > v.	Kilchoanite 
Biaxial (+), a=1.642-1.653, b=1.644-1.655, g=1.654-1.679, bire=0.0120-0.0260, 2V(Calc)=34-50, 2V(Meas)=20-50.  Dispersion r > v.	Mullite 
Biaxial (-), a=1.616-1.68, b=1.626-1.695, g=1.636-1.7, bire=0.0200, 2V(Calc)=58-88, 2V(Meas)=66-85.  Dispersion r > v or r < v.	Magnesiohornblende 
Biaxial (+), a=1.648, b=1.68, g=1.716, bire=0.0680, 2V(Calc)=90, 2V(Meas)=93.	Metakottigite 
Biaxial (+), a=1.648, b=1.664, g=1.702, bire=0.0540, 2V(Calc)=68, 2V(Meas)=63.4-67.	Sclarite 
Biaxial (+), a=1.639-1.658, b=1.643-1.664, g=1.646-1.671, bire=0.0070-0.0130, 2V(Calc)=80-86, 2V(Meas)=80.  Dispersion r < v strong.	Hiortdahlite 
Biaxial (-), a=1.649, b=1.683, g=1.691, bire=0.0420, 2V(Calc)=50, 2V(Meas)=40-45.  Dispersion strong, r < v.	Childrenite 
Biaxial (-), a=1.649, b=1.656, g=1.656, bire=0.0070	Maleevite !
Biaxial (+), a=1.649, b=1.655, g=1.714, bire=0.0650, 2V(Calc)=38, 2V(Meas)=36.8.  Dispersion r < v strong.	Natrochalcite 
Biaxial (?), a=1.649, g=1.715,  bire=0.0660	Ohmilite 
Biaxial (+), a=1.649, b=1.657, g=1.77, bire=0.1210, 2V(Calc)=32, 2V(Meas)=20.  Dispersion very weak r,v.	Tsepinite-Sr !
Biaxial (-), a=1.649, b=1.666, g=1.676, bire=0.0270, 2V(Calc)=74, 2V(Meas)=74.	Upalite 
Biaxial (+), a=1.649, b=1.655, g=1.759, bire=0.1100, 2V(Calc)=30, 2V(Meas)=20-28.  Dispersion weak, r < v.	Vuoriyarvite-K !
Biaxial (-), a=1.64-1.659, b=1.645-1.666, g=1.652-1.67, bire=0.0110-0.0120, 2V(Calc)=72-82, 2V(Meas)=12-65.  Dispersion very strong, r > v.	Crossite ?
Biaxial (+/-), b=1.65	Arrojadite-(BaFe) !
Biaxial (-), a=1.65, b=1.74, g=1.75, bire=0.1000, 2V(Calc)=34, 2V(Meas)=35.	Francoisite-(Nd) 
Biaxial (?), b=1.6-1.7	Hibbingite 
Biaxial (-), a=1.65, g=1.67,  bire=0.0200	Nyboite 
Biaxial (?), a=1.65, g=1.72,  bire=0.0700	Otwayite 
Biaxial (-), a=1.65, b=1.672, g=1.677, bire=0.0270, 2V(Calc)=50, 2V(Meas)=47.	Paraspurrite 
Biaxial (+), a=1.65, b=1.66, g=1.68, bire=0.0300, 2V(Calc)=72, 2V(Meas)=70-90.  Dispersion relatively strong.	Triplite 
Biaxial (-), a=1.65, b=1.85, g=1.9, bire=0.2500, 2V(Calc)=48, 2V(Meas)=44.	Vanuralite 
Biaxial (-), a=1.65, b=1.654-1.656, g=1.661, bire=0.0110, 2V(Calc)=76-84, 2V(Meas)=70.	Vladimirite 
Biaxial (+), b=1.65, 2V(Meas)=55-76.	Yanomamite 
Biaxial (+), a=1.643-1.658, b=1.648-1.664, g=1.674-1.685, bire=0.0270-0.0310, 2V(Calc)=48-58, 2V(Meas)=41-65.  Dispersion strong, r > v.	Reddingite 
Biaxial (-), a=1.651, b=1.659, g=1.661, bire=0.0100, 2V(Calc)=52, 2V(Meas)=35-52.	Bityite 
Biaxial (+), a=1.651, b=1.654, g=1.66, bire=0.0090	Clinoenstatite 
Biaxial (-), a=1.639-1.663, b=1.645-1.674, g=1.653-1.68, bire=0.0140-0.0170, 2V(Calc)=72-84, 2V(Meas)=88-65.  Dispersion relatively weak.	Monticellite 
Biaxial (+), a=1.652, b=1.658, g=1.67, bire=0.0180, 2V(Calc)=72, 2V(Meas)=72.	Baghdadite 
Biaxial (+), a=1.652, b=1.655, g=1.671, bire=0.0190, 2V(Calc)=48, 2V(Meas)=50.  Dispersion none.	Euclase 
Biaxial (+), a=1.652, b=1.653, g=1.673, bire=0.0210, 2V(Calc)=26, 2V(Meas)=21.	Kotoite 
Biaxial (-), a=1.65-1.654, b=1.685, g=1.699-1.715, bire=0.0490-0.0610	Soddyite 
Biaxial (+), a=1.65-1.655, b=1.654-1.664, g=1.661-1.675, bire=0.0110-0.0200, 2V(Calc)=76-86, 2V(Meas)=75-84.	Attakolite 
Biaxial (+), a=1.653, b=1.677, g=1.706, bire=0.0530, 2V(Calc)=86, 2V(Meas)=86.  Dispersion r < v strong.	Ankinovichite !
Biaxial (+), a=1.648-1.658, b=1.655-1.662, g=1.662-1.671, bire=0.0130-0.0140, 2V(Calc)=68-88, 2V(Meas)=80-90.  Dispersion relatively strong.	Dickinsonite !
Biaxial (+), a=1.653, b=1.675, g=1.697, bire=0.0440, 2V(Calc)=88, 2V(Meas)=82.  Dispersion r > v.	Ludlamite 
Biaxial (?), a=1.653, g=1.73,  bire=0.0770	Synchysite-(Y) 
Biaxial (-), a=1.654, b=1.666, g=1.671, bire=0.0170, 2V(Calc)=64, 2V(Meas)=74.  Dispersion r << v extreme.	Alumino-magnesiotaramite !
Biaxial (-), a=1.654, b=1.733, g=1.772, bire=0.1180, 2V(Calc)=66, 2V(Meas)=60-70.  Dispersion r < v.	Calcioancylite-(Ce) 
Biaxial (-), a=1.654, b=1.675, g=1.696, bire=0.0420, 2V(Calc)=88, 2V(Meas)=88-92.	Kornite 
Biaxial (-), a=1.654, b=1.674, g=1.684, bire=0.0300, 2V(Calc)=68, 2V(Meas)=45-65.  Dispersion r < v distinct.	Lulzacite !
Biaxial (-), a=1.654, b=1.664, g=1.67, bire=0.0160, 2V(Calc)=74, 2V(Meas)=79.  Dispersion dispersion not observed.	Potassicpargasite !
Biaxial (-), a=1.654-1.655, b=1.664-1.667, g=1.664-1.667, bire=0.0100-0.0120, 2V(Calc)=0, 2V(Meas)=0-5.	Cuprosklodowskite 
Biaxial (+), a=1.648-1.661, b=1.655-1.67, g=1.662-1.679, bire=0.0140-0.0180, 2V(Calc)=88, 2V(Meas)=54-69.  Dispersion weak, r < v.	Spodumene 
Biaxial (-), a=1.655, b=1.74, g=1.744, bire=0.0890, 2V(Calc)=22, 2V(Meas)=1-4.  Dispersion relatively strong.	Aurichalcite 
Biaxial (+), a=1.639-1.671, b=1.647-1.689, g=1.664-1.708, bire=0.0250-0.0370, 2V(Calc)=70-90, 2V(Meas)=65-90.  Dispersion r > v or r < v.	Cummingtonite 
Biaxial (-), a=1.655, b=1.657, g=1.678, bire=0.0230, 2V(Calc)=36, 2V(Meas)=50-60.	Gerstmannite 
Biaxial (-), a=1.655, b=1.875, g=1.909, bire=0.2540, 2V(Calc)=38, 2V(Meas)=43.  Dispersion relatively weak.	Malachite 
Biaxial (?), a=1.655, g=1.705,  bire=0.0500	Paraotwayite 
Biaxial (+), a=1.656, b=1.692, g=1.77, bire=0.1140, 2V(Calc)=72, 2V(Meas)=75.  Dispersion weak, r > v.	Geminite 
Biaxial (?), a=1.656, b=1.664, g=1.672, bire=0.0160, 2V(Calc)=88, 2V(Meas)=86.	Junitoite 
Biaxial (-), a=1.656, b=1.7, g=1.703, bire=0.0470, 2V(Calc)=28, 2V(Meas)=19-29.  Dispersion r > v.	Kuliokite-(Y) 
Biaxial (-), a=1.656, b=1.699, g=1.731, bire=0.0750, 2V(Calc)=78, 2V(Meas)=79.	Kupletskite 
Biaxial (+), a=1.651-1.662, b=1.653-1.665, g=1.659-1.672, bire=0.0080-0.0100, 2V(Calc)=62-68, 2V(Meas)=38-74.  Dispersion r > v strong.	Gotzenite 
Biaxial (?), a=1.657, g=1.66,  bire=0.0030	Bouazzerite !
Biaxial (-), a=1.657, b=1.741-1.747, g=1.789-1.795, bire=0.1320-0.1380, 2V(Calc)=68-70, 2V(Meas)=70.  Dispersion dispersion not observed.	Manganokukisvumite !
Biaxial (+), a=1.657, b=1.668, g=1.691, bire=0.0340, 2V(Calc)=72, 2V(Meas)=70-75.  Dispersion r < v marked.	Manganosegelerite 
Biaxial (+), a=1.657, b=1.666, g=1.765, bire=0.1080	Paratsepinite-Na !
Biaxial (+), a=1.653-1.661, b=1.654-1.67, g=1.669-1.684, bire=0.0160-0.0230, 2V(Calc)=30-80, 2V(Meas)=20-30.  Dispersion strong, r > v.	Sillimanite 
Biaxial (-), a=1.658, g=1.714,  bire=0.0560, 2V(Meas)=80-85.	Alvanite 
Biaxial (-), a=1.658, b=1.658, g=1.664, bire=0.0060, 2V(Calc)=0, 2V(Meas)=60.  Dispersion r < v strong.	Jungite 
Biaxial (-), a=1.658, b=1.687, g=1.71, bire=0.0520, 2V(Calc)=82, 2V(Meas)=81.5-83.	Magnesioastrophyllite 
Biaxial (-), a=1.658, b=1.669, g=1.67, bire=0.0120, 2V(Calc)=32, 2V(Meas)=25.	Zincosite *
Biaxial (+), a=1.6585, b=1.66, g=1.668, bire=0.0095, 2V(Calc)=48, 2V(Meas)=57.5.  Dispersion r > v.	Arrojadite-(PbFe) !
Biaxial (-), a=1.659, b=1.681, g=1.694, bire=0.0350, 2V(Calc)=74, 2V(Meas)=70.	Bergslagite 
Biaxial (+), a=1.659, g=1.676,  bire=0.0170	Dovyrenite !
Biaxial (+), a=1.65-1.668, b=1.652-1.673, g=1.659-1.679, bire=0.0090-0.0110, 2V(Calc)=58-86, 2V(Meas)=54-90.  Dispersion weak, r < v.	Enstatite 
Biaxial (-), a=1.659, b=1.703, g=1.732, bire=0.0730, 2V(Calc)=76, 2V(Meas)=78-79.	Lautenthalite 
Biaxial (+/-), a=1.638-1.68, b=1.652-1.698, 	Nagelschmidtite 
Biaxial (+), a=1.658-1.661, b=1.668, g=1.77, bire=0.1090-0.1120	Tsepinite-Na !
Biaxial (-), a=1.66, b=1.7-1.71, g=1.722, bire=0.0620	Bergenite 
Biaxial (-), a=1.66, b=1.725, g=1.761, bire=0.1010, 2V(Calc)=70, 2V(Meas)=70-74.	Calcioancylite-(Nd) 
Biaxial (-), a=1.66, b=1.684, g=1.69, bire=0.0300	Davanite 
Biaxial (-), a=1.66, b=1.684, g=1.69, bire=0.0300, 2V(Calc)=52, 2V(Meas)=48.	Davreuxite 
Biaxial (-), a=1.66, b=1.72, g=1.728, bire=0.0680, 2V(Calc)=38, 2V(Meas)=40.	Hydroastrophyllite 
Biaxial (-), a=1.66, b=1.715, g=1.734, bire=0.0740, 2V(Calc)=58, 2V(Meas)=33.	Lavendulan 
Biaxial (-), a=1.66, b=1.662, g=1.664, bire=0.0040, 2V(Calc)=88, 2V(Meas)=33-40.	Magnesio-arfvedsonite 
Biaxial (-), a=1.66, b=1.705, g=1.713, bire=0.0530, 2V(Calc)=44, 2V(Meas)=50.  Dispersion strong.	Tarbuttite 
Biaxial (-), a=1.66, b=1.72, g=1.728, bire=0.0680	Tetraferriannite 
Biaxial (-), a=1.66, b=1.831, g=1.915, bire=0.2550, 2V(Calc)=64, 2V(Meas)=65.	Umohoite 
Biaxial (-), a=1.66, b=1.712, g=1.736, bire=0.0760, 2V(Calc)=66, 2V(Meas)=67.	Urancalcarite 
Biaxial (-), a=1.66, b=1.705, g=1.715, bire=0.0550	Zincolibethenite !
Biaxial (+), a=1.658-1.6622, b=1.662-1.667, g=1.668-1.673, bire=0.0100-0.0108	Boracite 
Biaxial (-), a=1.64-1.681, b=1.658-1.688, g=1.66-1.692, bire=0.0110-0.0200, 2V(Calc)=36-72, 2V(Meas)=0-50.  Dispersion r < v strong.	Ferrikatophorite 
Biaxial (-), a=1.64-1.681, b=1.658-1.688, g=1.66-1.692, bire=0.0110-0.0200, 2V(Calc)=36-72, 2V(Meas)=0-50.  Dispersion r > v.	Katophorite 
Biaxial (-), a=1.64-1.681, b=1.658-1.688, g=1.66-1.692, bire=0.0110-0.0200, 2V(Calc)=36-72, 2V(Meas)=0-50.  Dispersion r < v strong.	Magnesioferrikatophorite 
Biaxial (-), a=1.64-1.681, b=1.658-1.688, g=1.66-1.692, bire=0.0110-0.0200	Magnesiokatophorite 
Biaxial (+), a=1.661, b=1.675, g=1.689, bire=0.0280, 2V(Calc)=88, 2V(Meas)=90.	Liskeardite 
Biaxial (-), a=1.653-1.67, b=1.661-1.69, g=1.669-1.7, bire=0.0160-0.0300, 2V(Calc)=68-88, 2V(Meas)=60-90.  Dispersion weak, r > v.	Magnesiohastingsite 
Biaxial (+), a=1.662, b=1.675, g=1.747, bire=0.0850	Allanpringite !
Biaxial (+), a=1.662, b=1.671, g=1.696, bire=0.0340, 2V(Calc)=64, 2V(Meas)=65.	Bearthite 
Biaxial (-), a=1.662, b=1.667, g=1.669, bire=0.0070	Clinohedrite 
Biaxial (+), a=1.662, b=1.671, g=1.692, bire=0.0300, 2V(Calc)=68, 2V(Meas)=66.	Nacareniobsite-(Ce) 
Biaxial (+), a=1.623-1.702, b=1.636-1.709, g=1.651-1.728, bire=0.0260-0.0280, 2V(Calc)=64-88, 2V(Meas)=52-90.  Dispersion weak, r > v.	Clinohumite 
Biaxial (+), a=1.65-1.675, b=1.674, g=1.674, bire=0.0010-0.0240, 2V(Meas)=0.	Greenalite 
Biaxial (-), a=1.663, b=1.675, g=1.684, bire=0.0210, 2V(Calc)=80, 2V(Meas)=71.  Dispersion r << v extreme.	Aluminotaramite !
Biaxial (?), a=1.663, g=1.684,  bire=0.0210	Cascandite 
Biaxial (+), a=1.663, b=1.672, g=1.694, bire=0.0310, 2V(Calc)=66, 2V(Meas)=71.8.  Dispersion r > v.	Olmiite !
Biaxial (-), a=1.663, b=1.715, g=1.734, bire=0.0710, 2V(Calc)=60, 2V(Meas)=60.	Ruizite 
Biaxial (+), a=1.663, b=1.674, g=1.699, bire=0.0360	Spodiosite ?
Biaxial (-), a=1.663, b=1.76, g=1.762, bire=0.0990, 2V(Calc)=14, 2V(Meas)=16.	Tengchongite 
Biaxial (+), a=1.654-1.673, b=1.659-1.679, g=1.667-1.693, bire=0.0130-0.0200, 2V(Calc)=68-78, 2V(Meas)=70-80.  Dispersion r < v.	Jadeite 
Biaxial (-), a=1.662-1.665, b=1.682-1.689, g=1.687-1.692, bire=0.0250-0.0270, 2V(Calc)=38-52, 2V(Meas)=40.  Dispersion strong, r < v.	Kainosite-(Y) 
Biaxial (+), a=1.664, b=1.67, g=1.675, bire=0.0110, 2V(Calc)=84, 2V(Meas)=86.	Arrojadite !
Biaxial (-), a=1.664, b=1.677, g=1.677, bire=0.0130	Barahonaite-(Fe) !
Biaxial (+), a=1.664, b=1.698, g=1.757, bire=0.0930, 2V(Calc)=78, 2V(Meas)=77.	Ferristrunzite 
Biaxial (-), a=1.664, b=1.691, g=1.695, bire=0.0310	Guanacoite !
Biaxial (+), a=1.664, b=1.674, g=1.688, bire=0.0240	Itoigawaite !
Biaxial (?), a=1.664, g=1.68,  bire=0.0160	Kankite 
Biaxial (+), a=1.664, b=1.681, g=1.686, bire=0.0220, 2V(Calc)=56, 2V(Meas)=80-85.  Dispersion r > v strong.	Lakebogaite !
Biaxial (-), a=1.665, b=1.715, g=1.715, bire=0.0500, 2V(Calc)=0, 2V(Meas)=6-16.	Khibinskite 
Biaxial (+), a=1.665, b=1.672-1.676, g=1.684-1.686, bire=0.0190-0.0210, 2V(Calc)=76-86, 2V(Meas)=84-85.  Dispersion strong, r > v.	Lawsonite 
Biaxial (+), a=1.665, b=1.668, g=1.681, bire=0.0160, 2V(Calc)=52, 2V(Meas)=43.  Dispersion strong, r < v.	Rinkite !
Biaxial (+), a=1.665, b=1.665, g=1.682, bire=0.0170, 2V(Calc)=0, 2V(Meas)=0-10.  Dispersion r > v very strong.	Ruifrancoite !
Biaxial (-), a=1.66-1.671, b=1.673-1.683, g=1.674-1.684, bire=0.0130-0.0140, 2V(Calc)=30-32, 2V(Meas)=3-48.  Dispersion r > v or r < v.	Kornerupine 
Biaxial (?), a=1.666, b=1.69, g=1.69, bire=0.0240, 2V(Calc)=0, 2V(Meas)=2.	Calumetite 
Biaxial (-), a=1.666, b=1.686, g=1.694, bire=0.0280, 2V(Calc)=62, 2V(Meas)=65-66.	Clinotyrolite 
Biaxial (+), a=1.666, b=1.676, g=1.78, bire=0.1140, 2V(Calc)=38, 2V(Meas)=30.  Dispersion r < v very weak.	Tsepinite-Ca !
Biaxial (-), a=1.661-1.671, b=1.682-1.694, g=1.689-1.702, bire=0.0280-0.0310, 2V(Calc)=58-60, 2V(Meas)=0-71.  Dispersion r > v strong.	Uranophane-beta 
Biaxial (-), a=1.667, b=1.674, g=1.679, bire=0.0120, 2V(Calc)=80, 2V(Meas)=56-59.	Erlianite 
Biaxial (-), a=1.667, b=1.679, g=1.69, bire=0.0230	Hubeite !
Biaxial (-), a=1.667, b=1.675, g=1.691, bire=0.0240, 2V(Calc)=72, 2V(Meas)=59-71.	Leakeite 
Biaxial (+), a=1.667, b=1.677, g=1.802, bire=0.1350	Lemmleinite-K !
Biaxial (+), a=1.667, b=1.674, g=1.77, bire=0.1030, 2V(Calc)=32, 2V(Meas)=30.  Dispersion dispersion not observed.	Paratsepinite-Ba !
Biaxial (-), a=1.64-1.695, b=1.651-1.708, g=1.653-1.71, bire=0.0130-0.0150	Bustamite 
Biaxial (+), a=1.6676, b=1.7001, g=1.794, bire=0.1264, 2V(Calc)=64, 2V(Meas)=58.5.  Dispersion dispersion not observed.	Gjerdingenite-Fe !
Biaxial (+), a=1.668, b=1.679, g=1.71, bire=0.0420	Bykovaite !
Biaxial (-), a=1.668, b=1.685, g=1.702, bire=0.0340, 2V(Calc)=88, 2V(Meas)=10-12.	Ferro-actinolite 
Biaxial (-), a=1.642-1.694, b=1.649-1.71, g=1.661-1.722, bire=0.0190-0.0280, 2V(Calc)=76-80, 2V(Meas)=82.	Ferrogedrite 
Biaxial (+), a=1.668, b=1.67, g=1.682, bire=0.0140, 2V(Calc)=46, 2V(Meas)=37.  Dispersion dispersion not observed.	Fluorarrojadite-(BaFe) !
Biaxial (-), a=1.668, b=1.672, g=1.68, bire=0.0120, 2V(Calc)=72, 2V(Meas)=75-85.	Magnesioriebeckite 
Biaxial (-), a=1.668, b=1.684, g=1.685, bire=0.0170, 2V(Calc)=26, 2V(Meas)=30.  Dispersion weak.	Walstromite 
Biaxial (-), a=1.659-1.678, b=1.684-1.691, g=1.686-1.692, bire=0.0140-0.0270, 2V(Calc)=30, 2V(Meas)=20-52.  Dispersion r > v or r < v.	Dumortierite 
Biaxial (+/-), a=1.669, b=1.688, g=1.707, bire=0.0380	Avdoninite !
Biaxial (-), a=1.669, b=1.6955, g=1.7005, bire=0.0315	Boltwoodite 
Biaxial (+), a=1.669, b=1.673, g=1.692, bire=0.0230, 2V(Calc)=50, 2V(Meas)=45-50.	Goedkenite 
Biaxial (+), a=1.669, b=1.673, g=1.682, bire=0.0130, 2V(Calc)=68, 2V(Meas)=65.	Lithiophilite 
Biaxial (+), a=1.669, b=1.672, g=1.677, bire=0.0080	Magnesiochlorophoenicite 
Biaxial (-), a=1.669, b=1.692, g=1.71, bire=0.0410, 2V(Calc)=80, 2V(Meas)=83.	Yingjiangite 
Biaxial (?), a=1.67, g=1.725,  bire=0.0550	Clinozoisite-(Sr) !
Biaxial (+), a=1.67, b=1.685, g=1.775, bire=0.1050, 2V(Calc)=48, 2V(Meas)=52.  Dispersion r < v weak.	Gjerdingenite-Mn !
Biaxial (+), a=1.67, b=1.671, g=1.677, bire=0.0070, 2V(Calc)=46, 2V(Meas)=32.  Dispersion r > v strong.	Katayamalite 
Biaxial (?), a=1.67, g=1.71,  bire=0.0400, 2V(Meas)=60.	Keldyshite 
Biaxial (-), a=1.67, b=1.69, g=1.72, bire=0.0500, 2V(Calc)=80, 2V(Meas)=40-70.  Dispersion r < v perceptible.	Lavenite 
Biaxial (-), a=1.67, b=1.75, g=1.778, bire=0.1080, 2V(Calc)=58, 2V(Meas)=56.	Lomonosovite 
Biaxial (-), a=1.67, b=1.68, g=1.69, bire=0.0200, 2V(Calc)=88, 2V(Meas)=83.	Metavanmeersscheite 
Biaxial (?), a=1.67, b=1.78, g=1.78, bire=0.1100	Nullaginite 
Biaxial (-), a=1.67, b=1.692, g=1.713, bire=0.0430	Parakeldyshite 
Biaxial (-), a=1.669-1.671, b=1.681-1.83, g=1.682-1.684, bire=0.0130	Prismatine !
Biaxial (-), a=1.67, b=1.728, g=1.732, bire=0.0620	Sussexite 
Biaxial (+), a=1.671, b=1.694, g=1.734, bire=0.0630, 2V(Calc)=76, 2V(Meas)=71.  Dispersion strong, r > v.	Bussenite !
Biaxial (-), a=1.671, b=1.681, g=1.69, bire=0.0190, 2V(Calc)=86, 2V(Meas)=75.	Gedrite 
Biaxial (+), a=1.671, b=1.674, g=1.684, bire=0.0130, 2V(Calc)=58, 2V(Meas)=75.  Dispersion relatively strong.	Natrophilite 
Biaxial (-), a=1.667-1.676, b=1.697-1.704, g=1.705-1.712, bire=0.0360-0.0380, 2V(Calc)=52-54, 2V(Meas)=55.	Sinhalite 
Biaxial (-), a=1.646-1.697, b=1.664-1.72, g=1.676-1.732, bire=0.0300-0.0350, 2V(Calc)=70-76, 2V(Meas)=70.	Taneyamalite 
Biaxial (?), a=1.672, b=1.676, g=1.683, bire=0.0110	Akrochordite 
Biaxial (+), a=1.672, b=1.672, g=1.673, bire=0.0010, 2V(Calc)=0, 2V(Meas)=60.  Dispersion r > v strong.	Baratovite 
Biaxial (+), a=1.672, b=1.693, g=1.71, bire=0.0380	Jagowerite 
Biaxial (-), a=1.672, b=1.739, g=1.802, bire=0.1300, 2V(Calc)=84, 2V(Meas)=85.	Lintisite 
Biaxial (+), a=1.672, b=1.678, g=1.712, bire=0.0400, 2V(Calc)=48, 2V(Meas)=50.	Mapimite 
Biaxial (+), a=1.672, b=1.68, g=1.7, bire=0.0280, 2V(Calc)=66, 2V(Meas)=68.  Dispersion r > v distinct.	Phosphoferrite 
Biaxial (+), a=1.672, b=1.68, g=1.692, bire=0.0200	Potassicleakeite !
Biaxial (-), a=1.672, b=1.829, g=1.83, bire=0.1580, 2V(Calc)=8, 2V(Meas)=0-5.	Rosasite 
Biaxial (-), a=1.672, b=1.685, g=1.698, bire=0.0260, 2V(Calc)=88, 2V(Meas)=90.	Talmessite 
Biaxial (-), a=1.672, b=1.718, g=1.722, bire=0.0500	Urusovite !
Biaxial (-), a=1.673, b=1.77, g=1.78, bire=0.1070	Chukanovite !
Biaxial (-), a=1.673, b=1.684, g=1.697, bire=0.0240, 2V(Calc)=86, 2V(Meas)=80-90.	Sadanagaite 
Biaxial (-), a=1.67-1.676, b=1.728-1.73, g=1.73-1.734, bire=0.0580-0.0600, 2V(Calc)=20-28, 2V(Meas)=26-28.  Dispersion r > v perceptible.	Sarcopside 
Biaxial (-), a=1.674, b=1.9, g=1.92, bire=0.2460, 2V(Calc)=30, 2V(Meas)=58.	Ianthinite 
Biaxial (+), a=1.674, b=1.683, g=1.694, bire=0.0200, 2V(Calc)=86, 2V(Meas)=80-90.  Dispersion Calculated β index.	Magnesiosadanagaite !
Biaxial (-), a=1.674, b=1.686, g=1.699, bire=0.0250, 2V(Calc)=90, 2V(Meas)=90.	Potassic-magnesiosadanagaite 
Biaxial (-), a=1.674, b=1.68, g=1.681, bire=0.0070, 2V(Calc)=44, 2V(Meas)=29.	Samfowlerite 
Biaxial (-), a=1.6742, b=1.6968, g=1.6999, bire=0.0257, 2V(Calc)=40, 2V(Meas)=41.9.  Dispersion r > v distinct.	Johninnesite 
Biaxial (-), a=1.663-1.686, b=1.68-1.709, g=1.696-1.729, bire=0.0330-0.0430, 2V(Calc)=84-86, 2V(Meas)=90-70.  Dispersion r > v.	Grunerite 
Biaxial (-), a=1.669-1.68, b=1.682-1.695, g=1.684-1.705, bire=0.0150-0.0250, 2V(Calc)=42-76, 2V(Meas)=40-81.  Dispersion r > v distinct.	Hastingsite 
Biaxial (-), a=1.669-1.68, b=1.682-1.695, g=1.684-1.705, bire=0.0150-0.0250	Potassic-chlorohastingsite !
Biaxial (-), a=1.675, b=1.723, g=1.765, bire=0.0900, 2V(Calc)=82, 2V(Meas)=78.	Clinochalcomenite 
Biaxial (-), a=1.675, g=1.687,  bire=0.0120, 2V(Meas)=82.	Ferriwinchite 
Biaxial (-), a=1.675, b=1.683, g=1.694, bire=0.0190, 2V(Calc)=82, 2V(Meas)=87.  Dispersion not discernible.	Fluoro-ferroleakeite 
Biaxial (?), b=1.64-1.71	Ningyoite 
Biaxial (-), a=1.675, b=1.687, g=1.69, bire=0.0150	Potassic-chloropargasite !
Biaxial (-), a=1.652-1.699, b=1.66-1.705, g=1.666-1.708, bire=0.0090-0.0140, 2V(Calc)=70-80, 2V(Meas)=30-70.  Dispersion r > v strong.	Arfvedsonite 
Biaxial (+), a=1.676, b=1.68, g=1.693, bire=0.0170, 2V(Calc)=60, 2V(Meas)=60.  Dispersion weak, r < v.	Curetonite 
Biaxial (-), a=1.676, b=1.746, g=1.795, bire=0.1190, 2V(Calc)=76, 2V(Meas)=77.	Kukisvumite 
Biaxial (-), a=1.676, b=1.695, g=1.698, bire=0.0220, 2V(Calc)=42, 2V(Meas)=43.	Maricite 
Biaxial (+), a=1.676, b=1.681, g=1.69, bire=0.0140, 2V(Calc)=74, 2V(Meas)=70.	Satpaevite 
Biaxial (-), a=1.676, b=1.725, g=1.745, bire=0.0690, 2V(Calc)=62, 2V(Meas)=60-65.	Whitmoreite 
Biaxial (-), a=1.677, b=1.684, g=1.692, bire=0.0150, 2V(Calc)=88, 2V(Meas)=88.	Donpeacorite 
Biaxial (?), b=1.676-1.678, g=1.686-1.688, 	Ferripyrophyllite 
Biaxial (+), a=1.677, b=1.684, g=1.79, bire=0.1130, 2V(Calc)=32, 2V(Meas)=25.  Dispersion dispersion not observed.	Neskevaaraite-Fe !
Biaxial (+), a=1.674-1.68, b=1.677-1.682, g=1.705-1.71, bire=0.0250-0.0360, 2V(Calc)=34-36, 2V(Meas)=33.	Serandite 
Biaxial (-), a=1.678, b=1.69, g=1.694, bire=0.0160, 2V(Calc)=58, 2V(Meas)=70.  Dispersion r < v strong.	Aravaipaite 
Biaxial (-), a=1.678, b=1.706, g=1.721, bire=0.0430, 2V(Calc)=70, 2V(Meas)=74.  Dispersion r > v.	Ernstite 
Biaxial (+), a=1.678, b=1.68, g=1.683, bire=0.0050, 2V(Calc)=80, 2V(Meas)=52.	Harstigite 
Biaxial (-), a=1.678, b=1.7, g=1.701, bire=0.0230, 2V(Calc)=22, 2V(Meas)=38.5.	Magnesiodumortierite 
Biaxial (+), a=1.678, b=1.68, g=1.691, bire=0.0130	Pumpellyite-(Al) !
Biaxial (+), a=1.678, b=1.684, g=1.691-1.91, bire=0.0130-0.2320, 2V(Calc)=22-86, 2V(Meas)=79.  Dispersion r >> v strong.	Qingheiite 
Biaxial (+), a=1.678, b=1.687, g=1.705, bire=0.0270	Rosenbuschite 
Biaxial (+), a=1.678, b=1.684, g=1.699, bire=0.0210, 2V(Calc)=66, 2V(Meas)=67.	Sverigeite 
Biaxial (-), a=1.679, b=1.734, g=1.742, bire=0.0630, 2V(Calc)=40, 2V(Meas)=25-30.  Dispersion r > v strong.	Huemulite 
Biaxial (-), a=1.679, b=1.776, g=1.807, bire=0.1280, 2V(Calc)=56, 2V(Meas)=57.	Sahamalite-(Ce) 
Biaxial (-), a=1.67-1.689, b=1.69-1.741, g=1.7-1.772, bire=0.0300-0.0830, 2V(Calc)=68-72, 2V(Meas)=66-82.	Kaersutite 
Biaxial (+), a=1.68, b=1.687, g=1.787, bire=0.1070, 2V(Calc)=32, 2V(Meas)=25.  Dispersion dispersion not observed.	Alsakharovite-Zn !
Biaxial (+), a=1.68, b=1.7, g=1.73, bire=0.0500, 2V(Calc)=80, 2V(Meas)=70-90.  Dispersion none.	Astrophyllite 
Biaxial (?), a=1.68, g=1.68,  bire=0.0000	Balangeroite 
Biaxial (-), a=1.68, b=1.694, g=1.708, bire=0.0280	Ciprianiite !
Biaxial (-), a=1.68, b=1.68, g=1.7, bire=0.0200, 2V(Calc)=0, 2V(Meas)=20.  Dispersion Calculated.	Ferrokinoshitalite !
Biaxial (+), a=1.68, b=1.682, g=1.762, bire=0.0820, 2V(Calc)=20, 2V(Meas)=25.  Dispersion dispersion not observed.	Gjerdingenite-Ca !
Biaxial (-), a=1.68, b=1.694, g=1.708, bire=0.0280	Hellandite-(Ce) !
Biaxial (-), a=1.68, b=1.835, g=1.865, bire=0.1850, 2V(Calc)=44, 2V(Meas)=45.	Metatyuyamunite 
Biaxial (-), a=1.68, b=1.694, g=1.708, bire=0.0280	Mottanaite-(Ce) !
Biaxial (-), a=1.68, b=1.704, g=1.712, bire=0.0320, 2V(Calc)=58, 2V(Meas)=60.	Parnauite 
Biaxial (+), a=1.68, b=1.69, g=1.7, bire=0.0200, 2V(Calc)=88, 2V(Meas)=70-90.	Petedunnite 
Biaxial (-), a=1.68, b=1.695, g=1.698, bire=0.0180	Tschermakite 
Biaxial (-), a=1.65-1.71, b=1.85-1.92, g=1.9-1.95, bire=0.2400-0.2500, 2V(Calc)=36-48, 2V(Meas)=44.  Dispersion r < v weak.	Vanuranylite ?
Biaxial (+), a=1.68, b=1.692, g=1.72, bire=0.0400, 2V(Calc)=68, 2V(Meas)=68.	Vyuntspakhkite-(Y) 
Biaxial (-), a=1.681, b=1.728, g=1.769, bire=0.0880, 2V(Calc)=82, 2V(Meas)=83.	Cobaltomenite 
Biaxial (+), a=1.663-1.699, b=1.671-1.705, g=1.693-1.728, bire=0.0290-0.0300, 2V(Calc)=56-64, 2V(Meas)=58-63.  Dispersion weak to distinct, r > v.	Diopside 
Biaxial (-), a=1.681, b=1.688, g=1.69, bire=0.0090, 2V(Calc)=56, 2V(Meas)=54.4.	Nchwaningite 
Biaxial (-), a=1.681, b=1.696, g=1.708, bire=0.0270, 2V(Calc)=82, 2V(Meas)=83.	Santaclaraite 
Biaxial (+), a=1.68-1.683, b=1.686-1.688, g=1.783-1.787, bire=0.1030-0.1040, 2V(Calc)=28-30, 2V(Meas)=25.  Dispersion dispersion not observed.	Kuzmenkoite-Zn !
Biaxial (+), a=1.662-1.701, b=1.67-1.712, g=1.685-1.723, bire=0.0220-0.0230, 2V(Calc)=74-88, 2V(Meas)=58-83.  Dispersion r > v moderate.	Omphacite 
Biaxial (-), a=1.682, b=1.69, g=1.697, bire=0.0150, 2V(Calc)=84, 2V(Meas)=83.  Dispersion relatively strong.	Chlorophoenicite 
Biaxial (-), a=1.682, b=1.695, g=1.707, bire=0.0250	Jahnsite-(MnMnMn) *
Biaxial (-), a=1.682, b=1.695, g=1.702, bire=0.0200	Potassic-magnesiohastingsite !
Biaxial (+), a=1.682, b=1.685, g=1.694, bire=0.0120	Pumpellyite-(Fe++) 
Biaxial (+), a=1.682, b=1.685, g=1.694, bire=0.0120	Pumpellyite-(Fe+++) 
Biaxial (-), a=1.682, b=1.845, g=1.855, bire=0.1730, 2V(Calc)=24, 2V(Meas)=42.	Uranotungstite 
Biaxial (-), a=1.672-1.693, b=1.677-1.701, g=1.681-1.704, bire=0.0090-0.0110, 2V(Calc)=62-82, 2V(Meas)=69-87.  Dispersion strong, r < v.	Axinite-(Fe) 
Biaxial (-), a=1.672-1.693, b=1.677-1.701, g=1.681-1.704, bire=0.0090-0.0110, 2V(Calc)=62-82, 2V(Meas)=69-87.  Dispersion strong, r < v.	Axinite-(Mg) 
Biaxial (-), a=1.672-1.693, b=1.677-1.701, g=1.681-1.704, bire=0.0090-0.0110, 2V(Calc)=62-82, 2V(Meas)=69-87.  Dispersion strong, r < v.	Axinite-(Mn) 
Biaxial (+), a=1.682-1.683, b=1.687-1.695, g=1.718-1.72, bire=0.0360-0.0370, 2V(Calc)=46-72, 2V(Meas)=66.	Bornemanite 
Biaxial (-), a=1.679-1.686, b=1.716-1.723, g=1.729-1.736, bire=0.0500, 2V(Calc)=60, 2V(Meas)=61.  Dispersion medium, r > v.	Glaucochroite 
Biaxial (-), a=1.636-1.73, b=1.65-1.739, g=1.669-1.772, bire=0.0330-0.0420, 2V(Calc)=56-84, 2V(Meas)=74-90.  Dispersion r > v or r < v.	Forsterite 
Biaxial (-), a=1.683, b=1.715, g=1.724, bire=0.0410	Jervisite 
Biaxial (+), a=1.683, b=1.687, g=1.775, bire=0.0920	Kuzmenkoite-Mn !
Biaxial (+), a=1.683, b=1.69, g=1.82, bire=0.1370, 2V(Calc)=28, 2V(Meas)=37.  Dispersion r > v medium.	Lemmleinite-Ba !
Biaxial (+), a=1.683, b=1.692, g=1.795, bire=0.1120, 2V(Calc)=36, 2V(Meas)=30.  Dispersion dispersion not observed.	Lepkhenelmite-Zn !
Biaxial (+), a=1.683, b=1.692, g=1.775, bire=0.0920, 2V(Calc)=38, 2V(Meas)=40.  Dispersion weak.	Organovaite-Mn !
Biaxial (+), a=1.683, b=1.688, g=1.785, bire=0.1020	Organovaite-Zn !
Biaxial (-), a=1.683, b=1.692, g=1.699, bire=0.0160, 2V(Calc)=82, 2V(Meas)=>60.  Dispersion strong, r > v.	Potassicarfvedsonite !
Biaxial (-), a=1.674-1.693, b=1.694-1.734, g=1.706-1.735, bire=0.0320-0.0420, 2V(Calc)=16-74, 2V(Meas)=50.	Kirschsteinite 
Biaxial (-), a=1.684, b=1.695, g=1.698, bire=0.0140	Kempite 
Biaxial (+), a=1.684, b=1.695, g=1.718, bire=0.0340	Kochite !
Biaxial (+), a=1.684, b=1.688, g=1.705, bire=0.0210, 2V(Calc)=54, 2V(Meas)=52-56.  Dispersion r > v.	Penikisite 
Biaxial (+), a=1.67-1.698, b=1.672-1.706, g=1.684-1.72, bire=0.0140-0.0220, 2V(Calc)=46-76, 2V(Meas)=10-50.  Dispersion relatively strong.	Pumpellyite-(Mg) 
Biaxial (+), a=1.684, b=1.691, g=1.7, bire=0.0160	Vanadiocarpholite !
Biaxial (-), a=1.685, b=1.717, g=1.72, bire=0.0350, 2V(Calc)=32, 2V(Meas)=34-36.	Kozulite 
Biaxial (+), a=1.686, b=1.696, g=1.835, bire=0.1490	Labuntsovite-Fe !
Biaxial (+), a=1.686, b=1.691, g=1.708, bire=0.0220, 2V(Calc)=58, 2V(Meas)=60.  Dispersion r > v weak.	Marsturite 
Biaxial (-), a=1.686, b=1.71, g=1.72, bire=0.0340, 2V(Calc)=64, 2V(Meas)=55.	Paramendozavilite 
Biaxial (-), a=1.686, b=1.718, g=1.72, bire=0.0340, 2V(Calc)=26, 2V(Meas)=28.	Ponomarevite 
Biaxial (+), a=1.686, b=1.694, g=1.709, bire=0.0230	Scandiobabingtonite !
Biaxial (+), a=1.686, b=1.694, g=1.72, bire=0.0340	Watatsumiite !
Biaxial (+), a=1.686, b=1.69, g=1.703, bire=0.0170, 2V(Calc)=60, 2V(Meas)=58.	Zwieselite 
Biaxial (-), a=1.687, b=1.725, g=1.748, bire=0.0610, 2V(Calc)=74, 2V(Meas)=74.	Bermanite 
Biaxial (+), a=1.687, b=1.689, g=1.805, bire=0.1180	Parakuzmenkoite-Fe !
Biaxial (-), a=1.687, b=1.722, g=1.731, bire=0.0440, 2V(Calc)=52, 2V(Meas)=52.	Tarapacaite 
Biaxial (+), a=1.687-1.689, b=1.69-1.694, g=1.72-1.722, bire=0.0330	Dellaventuraite !
Biaxial (+), a=1.688, b=1.691, g=1.696, bire=0.0080, 2V(Calc)=76, 2V(Meas)=50.  Dispersion r < v strong.	Ferrowyllieite 
Biaxial (+), a=1.688, b=1.7, g=1.805, bire=0.1170, 2V(Calc)=40, 2V(Meas)=35.  Dispersion dispersion not observed.	Gutkovaite-Mn !
Biaxial (?), a=1.688, g=1.9,  bire=0.2120	Kolwezite 
Biaxial (+), a=1.688, b=1.692, g=1.802, bire=0.1140	Labuntsovite-Mg !
Biaxial (?), a=1.686-1.69, b=1.707, g=1.724-1.726, bire=0.0360-0.0380	Lermontovite 
Biaxial (+), a=1.688, b=1.691, g=1.696, bire=0.0080, 2V(Calc)=76, 2V(Meas)=80.	Rosemaryite 
Biaxial (+), a=1.688, b=1.691, g=1.696, bire=0.0080, 2V(Calc)=76, 2V(Meas)=50.	Wyllieite 
Biaxial (+), a=1.675-1.702, b=1.69-1.709, g=1.735-1.74, bire=0.0380-0.0600, 2V(Calc)=52-62, 2V(Meas)=50.	Legrandite 
Biaxial (-), a=1.68-1.698, b=1.683-1.7, g=1.685-1.706, bire=0.0050-0.0080, 2V(Calc)=62-78, 2V(Meas)=68-85.  Dispersion strong, r < v.	Riebeckite 
Biaxial (+), a=1.684-1.695, b=1.693-1.702, g=1.792-1.814, bire=0.1080-0.1190, 2V(Calc)=30-36, 2V(Meas)=20-44.	Labuntsovite-Mn !
Biaxial (-), a=1.69, b=1.69-1.7, g=1.7, bire=0.0100, 2V(Calc)=0, 2V(Meas)=40.45.  Dispersion weak to moderate, r > v.	Barylite 
Biaxial (?), a=1.69, g=1.73,  bire=0.0400	Birnessite 
Biaxial (-), a=1.69, g=1.71,  bire=0.0200, 2V(Meas)=68-72.	Ferrorichterite 
Biaxial (-), a=1.69, b=1.83, g=1.83, bire=0.1400	Glaukosphaerite 
Biaxial (-), a=1.69, b=1.718, g=1.718-1.719, bire=0.0280-0.0290, 2V(Calc)=0-20, 2V(Meas)=5-20.  Dispersion r > v strong.	Phosphuranylite 
Biaxial (-), a=1.69, b=1.73, g=1.749, bire=0.0590, 2V(Calc)=66, 2V(Meas)=68.	Phurcalite 
Biaxial (-), a=1.69, b=1.71, g=1.726, bire=0.0360	Protoferro-anthophyllite !
Biaxial (-), a=1.69, b=1.714, g=1.735, bire=0.0450	Schoepite 
Biaxial (+), a=1.69, b=1.701, g=1.8, bire=0.1100	Tsepinite-K !
Biaxial (-), a=1.69, b=1.705, g=1.711, bire=0.0210, 2V(Calc)=64, 2V(Meas)=large.  Dispersion r > v distinct.	Yftisite-(Y) ?
Biaxial (+), a=1.689-1.691, b=1.691-1.693, g=1.712-1.715, bire=0.0230-0.0240, 2V(Calc)=34-36, 2V(Meas)=25-30.	Yoderite 
Biaxial (+), a=1.69-1.6908, b=1.6927-1.7, g=1.7194-1.736, bire=0.0294-0.0452, 2V(Calc)=36-56, 2V(Meas)=36-49.  Dispersion r < v strong.	Neptunite 
Biaxial (-), a=1.687-1.694, b=1.7-1.707, g=1.701-1.712, bire=0.0140-0.0180, 2V(Calc)=30-62, 2V(Meas)=12-76.  Dispersion r > v or r < v.	Ferrohornblende 
Biaxial (-), a=1.691, b=1.713, g=1.73, bire=0.0390	Pseudosinhalite !
Biaxial (+), a=1.68-1.703, b=1.684-1.711, g=1.706-1.729, bire=0.0260, 2V(Calc)=48-68, 2V(Meas)=40-52.  Dispersion weak to distinct, r > v.	Augite 
Biaxial (+/-), a=1.689-1.694, b=1.689-1.695, g=1.695-1.702, bire=0.0060-0.0080	Triphylite 
Biaxial (+), a=1.692, b=1.695, g=1.71, bire=0.0180, 2V(Calc)=50, 2V(Meas)=35.	Bjarebyite 
Biaxial (-), b=1.692, g=1.699, 	Keckite 
Biaxial (-), a=1.692, b=1.757, g=1.8, bire=0.1080, 2V(Calc)=74, 2V(Meas)=75.	Munirite 
Biaxial (-), a=1.692, b=1.725, g=1.738, bire=0.0460, 2V(Calc)=62, 2V(Meas)=62.	Phosphosiderite 
Biaxial (-), a=1.693, b=1.738, g=1.74, bire=0.0470	Kipushite 
Biaxial (-), a=1.693, b=1.721, g=1.723, bire=0.0300	Redgillite !
Biaxial (?), a=1.693, g=1.738,  bire=0.0450	Surite 
Biaxial (-), a=1.693, b=1.701, g=1.704, bire=0.0110, 2V(Calc)=62, 2V(Meas)=62.	Tinzenite 
Biaxial (+), a=1.694, b=1.698, g=1.715, bire=0.0210, 2V(Calc)=54, 2V(Meas)=46.4.	Bobfergusonite 
Biaxial (?), a=1.694, g=1.735,  bire=0.0410	Grenmarite !
Biaxial (-), a=1.694, b=1.698, g=1.702, bire=0.0080, 2V(Calc)=88, 2V(Meas)=83.  Dispersion r > v medium.	Sodic-ferripedrizite !
Biaxial (-), a=1.694, b=1.726, g=1.73, bire=0.0360, 2V(Calc)=38, 2V(Meas)=36.  Dispersion relatively strong.	Tyrolite 
Biaxial (+), a=1.694, b=1.703, g=1.713, bire=0.0190, 2V(Calc)=88, 2V(Meas)=87.  Dispersion r < v.	Wendwilsonite 
Biaxial (+), a=1.695, b=1.698, g=1.733, bire=0.0380, 2V(Calc)=34, 2V(Meas)=29.  Dispersion relatively weak.	Euchroite 
Biaxial (-), a=1.695, b=1.7, g=1.702, bire=0.0070, 2V(Calc)=64, 2V(Meas)=55.  Dispersion r > v.	Ferripedrizite !
Biaxial (+), a=1.695, b=1.718, g=1.759, bire=0.0640, 2V(Calc)=76, 2V(Meas)=75.	Kamchatkite 
Biaxial (-), a=1.695, b=1.714, g=1.731, bire=0.0360	Protomangano-ferro-anthophyllite !
Biaxial (-), a=1.696, b=1.745, g=1.765, bire=0.0690, 2V(Calc)=62, 2V(Meas)=64.	Earlshannonite 
Biaxial (+), a=1.696, b=1.73, g=1.798, bire=0.1020, 2V(Calc)=74, 2V(Meas)=73.	Ojuelaite 
Biaxial (-), a=1.696, b=1.7, g=1.715, bire=0.0190	Potassicferrisadanagaite !
Biaxial (-), a=1.696, b=1.711, g=1.715, bire=0.0190, 2V(Calc)=54, 2V(Meas)=54.3-57.	Vistepite 
Biaxial (+), a=1.685-1.708, b=1.688-1.711, g=1.7-1.723, bire=0.0150, 2V(Calc)=54, 2V(Meas)=25.  Dispersion r > v strong.	Beusite 
Biaxial (+), a=1.695-1.698, b=1.7-1.702, g=1.705-1.708, bire=0.0100	Clinobarylite !
Biaxial (+), a=1.697, b=1.7, g=1.725, bire=0.0280, 2V(Calc)=40, 2V(Meas)=36.	Manganoneptunite 
Biaxial (?), a=1.69-1.704, b=1.702-1.716, g=1.712-1.726, bire=0.0220, 2V(Calc)=84, 2V(Meas)=-60.  Dispersion strong, r > v.	Simferite 
Biaxial (+), a=1.698, b=1.704, g=1.72, bire=0.0220, 2V(Calc)=64, 2V(Meas)=65.5.	Akatoreite 
Biaxial (?), a=1.698, g=1.78,  bire=0.0820	Kozoite-(Nd) !
Biaxial (+), a=1.696-1.7, b=1.696-1.702, g=1.702-1.718, bire=0.0060-0.0180, 2V(Calc)=0-40, 2V(Meas)=0-70.  Dispersion relatively strong.	Zoisite 
Biaxial (+), a=1.699, b=1.715, g=1.737, bire=0.0380	Ercitite !
Biaxial (+), a=1.699, b=1.703, g=1.708, bire=0.0090, 2V(Calc)=84, 2V(Meas)=72.  Dispersion r < v.	Ferri-clinoholmquistite !
Biaxial (?), a=1.7, g=1.76,  bire=0.0600	Cabalzarite !
Biaxial (-), a=1.7, b=1.745, g=1.775, bire=0.0750	Caryochroite !
Biaxial (+), a=1.7, b=1.715, g=1.732, bire=0.0320, 2V(Calc)=88, 2V(Meas)=65.	Eveite 
Biaxial (-), a=1.7, b=1.713, g=1.718, bire=0.0180	Ferropargasite 
Biaxial (+), a=1.7, b=1.705, g=1.724, bire=0.0240, 2V(Calc)=56, 2V(Meas)=30-60.  Dispersion relatively weak.	Graftonite 
Biaxial (+), a=1.7, b=1.705, g=1.712, bire=0.0120, 2V(Calc)=82, 2V(Meas)=Large.  Dispersion r >v strong, N calculated.	Hainite 
Biaxial (-), a=1.7, b=1.95, g=2.04, bire=0.3400, 2V(Calc)=54, 2V(Meas)=52.	Hydrotungstite 
Biaxial (-), a=1.67-1.73, b=1.7-1.76, g=1.72-1.77, bire=0.0400-0.0500	Iddingsite ?
Biaxial (?), a=1.7, b=1.74, g=1.79, bire=0.0900	Magnesiozippeite 
Biaxial (-), a=1.7, b=1.715, g=1.725, bire=0.0250, 2V(Calc)=76, 2V(Meas)=80.  Dispersion weak, r < v.	Marianoite !
Biaxial (-), a=1.7, b=2.1, g=2.23, bire=0.5300	Metahewettite 
Biaxial (+), a=1.7, b=1.71, g=1.734, bire=0.0340	Nechelyustovite !
Biaxial (?), a=1.7, b=1.75, g=1.77, bire=0.0700, 2V(Calc)=62, 2V(Meas)=40.	Paraschoepite 
Biaxial (+), a=1.7, b=1.715, g=1.738, bire=0.0380, 2V(Calc)=80, 2V(Meas)=81.  Dispersion r > v strong.	Rouaite !
Biaxial (-), a=1.7, b=1.8, g=1.82-1.84, bire=0.1200-0.1400, 2V(Calc)=46-60, 2V(Meas)=55.	Roubaultite 
Biaxial (-), a=1.7, b=2.21, g=2.38, bire=0.6800, 2V(Calc)=48, 2V(Meas)=48.	Sidwillite 
Biaxial (?), b=1.7	Spheniscidite 
Biaxial (-), a=1.7, b=1.725, g=1.73, bire=0.0300, 2V(Calc)=46, 2V(Meas)=48.	Vuagnatite 
Biaxial (-), a=1.7, b=1.726-1.729, g=1.729-1.731, bire=0.0290-0.0310	Vyacheslavite 
Biaxial (-), a=1.7-1.701, b=1.714-1.721, g=1.72-1.73, bire=0.0200-0.0290, 2V(Calc)=64-66, 2V(Meas)=34-56.	Niocalite 
Biaxial (+), a=1.7-1.702, b=1.72-1.722, g=1.747-1.752, bire=0.0470-0.0500, 2V(Calc)=80-84, 2V(Meas)=80-88.  Dispersion weak, r < v.	Diaspore 
Biaxial (-), a=1.701, b=1.72, g=1.734, bire=0.0330, 2V(Calc)=80, 2V(Meas)=65.	Howieite 
Biaxial (+), a=1.701, b=1.721, g=1.751, bire=0.0500, 2V(Calc)=80, 2V(Meas)=79.9.  Dispersion r > v weak.	Parabrandtite 
Biaxial (+), a=1.701, b=1.703, g=1.706, bire=0.0050, 2V(Calc)=80, 2V(Meas)=80.  Dispersion strong, r < v.	Serendibite 
Biaxial (+), a=1.702, b=1.73, g=1.823, bire=0.1210, 2V(Calc)=62, 2V(Meas)=75-90.	Kanonaite 
Biaxial (-), a=1.702, b=1.745, g=1.789, bire=0.0870, 2V(Calc)=88, 2V(Meas)=80-90.  Dispersion relatively strong.	Libethenite 
Biaxial (+), a=1.683-1.722, b=1.684-1.722, g=1.704-1.752, bire=0.0210-0.0300, 2V(Calc)=0-26, 2V(Meas)=0-32.  Dispersion weak to distinct, r < v.	Pigeonite 
Biaxial (-), a=1.7-1.705, b=1.716-1.72, g=1.726-1.728, bire=0.0230-0.0260, 2V(Calc)=70-76, 2V(Meas)=70-77.  Dispersion r > v weak.	Wohlerite 
Biaxial (-), a=1.703, b=1.744, g=1.786, bire=0.0830, 2V(Calc)=88, 2V(Meas)=85.  Dispersion r < v.	Ahlfeldite 
Biaxial (+), a=1.703, b=1.713, g=1.722, bire=0.0190, 2V(Calc)=86, 2V(Meas)=85.	Gerhardtite 
Biaxial (+), a=1.703, b=1.705, g=1.723, bire=0.0200, 2V(Calc)=38, 2V(Meas)=32.  Dispersion r >> v strong.	Kulanite 
Biaxial (+), a=1.703, b=1.71, g=1.72, bire=0.0170, 2V(Calc)=82, 2V(Meas)=50-57.	Zincroselite 
Biaxial (-), a=1.704, b=1.802, g=1.842, bire=0.1380	Petterdite !
Biaxial (-), a=1.704, b=1.715, g=1.718, bire=0.0140, 2V(Calc)=54, 2V(Meas)=56.	Vanmeersscheite 
Biaxial (-), a=1.704, b=1.715, g=1.724, bire=0.0200, 2V(Calc)=82, 2V(Meas)=80-90.	Xanthoxenite 
Biaxial (-), a=1.705, b=1.767, g=1.769, bire=0.0640, 2V(Calc)=18, 2V(Meas)=25.  Dispersion r > v weak.	Simplotite 
Biaxial (-), a=1.705, b=1.713, g=1.715, bire=0.0100, 2V(Calc)=52, 2V(Meas)=60-80.	Taramite 
Biaxial (+), a=1.706, b=1.71, g=1.73, bire=0.0240, 2V(Calc)=50, 2V(Meas)=45.	Natronambulite 
Biaxial (+), a=1.707, b=1.715, g=1.73, bire=0.0230, 2V(Calc)=74, 2V(Meas)=large.	Larnite 
Biaxial (+), a=1.707, b=1.721, g=1.739, bire=0.0320	Leucophosphite 
Biaxial (+), a=1.707, b=1.712, g=1.723, bire=0.0160, 2V(Calc)=70, 2V(Meas)=37.	Manganhumite 
Biaxial (+), a=1.706-1.708, b=1.711-1.712, g=1.718-1.724, bire=0.0120-0.0160, 2V(Calc)=62-82, 2V(Meas)=67.  Dispersion r > v.	Merwinite 
Biaxial (+), a=1.707, b=1.71, g=1.73, bire=0.0230, 2V(Calc)=44, 2V(Meas)=30.  Dispersion r > v weak.	Nambulite 
Biaxial (-), a=1.707, b=1.741, g=1.755, bire=0.0480, 2V(Calc)=64, 2V(Meas)=64.  Dispersion r > v.	Paravinogradovite !
Biaxial (+), a=1.707-1.709, b=1.711, g=1.724-1.729, bire=0.0170-0.0200, 2V(Calc)=38-60, 2V(Meas)=23.  Dispersion r < v strong.	Brandtite 
Biaxial (-), a=1.708, b=1.76, g=1.798, bire=0.0900, 2V(Calc)=78, 2V(Meas)=65.	Langite 
Biaxial (+), a=1.708, b=1.71, g=1.719, bire=0.0110	Oxykinoshitalite !
Biaxial (+), a=1.708, g=1.722,  bire=0.0140, 2V(Meas)=70.  Dispersion r > v.	Varulite 
Biaxial (-), a=1.708, b=1.738, g=1.747, bire=0.0390, 2V(Calc)=56, 2V(Meas)=62.	Zircophyllite 
Biaxial (-), a=1.682-1.735, b=1.765-1.77, g=1.807-1.839, bire=0.1040-0.1250, 2V(Calc)=66-74, 2V(Meas)=57-64.  Dispersion r > v weak.	Murmanite 
Biaxial (-), a=1.709, b=1.735, g=1.744, bire=0.0350, 2V(Calc)=60, 2V(Meas)=60.	Kamitugaite 
Biaxial (?), b=1.709	Magnesiostaurolite !
Biaxial (+), a=1.709, b=1.718, g=1.734, bire=0.0250, 2V(Calc)=76, 2V(Meas)=70.	Metahohmannite 
Biaxial (+), a=1.709, b=1.726, g=1.75, bire=0.0410	Sophiite 
Biaxial (+), a=1.709, b=1.717, g=1.729, bire=0.0200, 2V(Calc)=80, 2V(Meas)=80.	Stringhamite 
Biaxial (+), a=1.703-1.716, b=1.711-1.728, g=1.732-1.745, bire=0.0290, 2V(Calc)=64-82, 2V(Meas)=68-70.	Johannsenite 
Biaxial (-), a=1.71, g=1.73,  bire=0.0200, 2V(Meas)=20.	Ferro-edenite 
Biaxial (?), a=1.71, b=1.71-1.73, g=1.73, bire=0.0200	Juabite !
Biaxial (-), a=1.71, b=1.77, g=1.84, bire=0.1300, 2V(Calc)=90, 2V(Meas)=70.  Dispersion relatively strong.	Rossite 
Biaxial (-), a=1.71, b=1.755, g=1.775, bire=0.0650, 2V(Calc)=64, 2V(Meas)=66.	Schuilingite-(Nd) 
Biaxial (+), a=1.71, b=1.718, g=1.78, bire=0.0700, 2V(Calc)=42, 2V(Meas)=35-45.  Dispersion r > v strong.	Strontiojoaquinite 
Biaxial (+), a=1.71, b=1.718, g=1.78, bire=0.0700, 2V(Calc)=42, 2V(Meas)=35-45.	Strontio-orthojoaquinite 
Biaxial (?), a=1.71, g=1.735,  bire=0.0250	Vanalite 
Biaxial (-), a=1.707-1.714, b=1.745-1.746, g=1.765-1.772, bire=0.0580, 2V(Calc)=70-82, 2V(Meas)=64-90.  Dispersion r < v distinct.	Shcherbakovite 
Biaxial (+), a=1.7-1.723, b=1.716-1.73, g=1.755-1.795, bire=0.0550-0.0720	Rutherfordine 
Biaxial (+), a=1.712, b=1.721, g=1.731, bire=0.0190	Adelite 
Biaxial (+), a=1.712, b=1.716, g=1.725, bire=0.0130, 2V(Calc)=68, 2V(Meas)=30.	Bredigite 
Biaxial (-), a=1.712, b=1.732, g=1.732, bire=0.0200, 2V(Calc)=0, 2V(Meas)=0.	Chalcomenite 
Biaxial (-), a=1.669-1.755, b=1.674-1.763, g=1.68-1.773, bire=0.0110-0.0180, 2V(Calc)=86, 2V(Meas)=70-90.  Dispersion weak, r < v.	Hypersthene ?
Biaxial (+), a=1.712, b=1.717, g=1.726, bire=0.0140	Johachidolite 
Biaxial (+), a=1.712, b=1.725, g=1.76, bire=0.0480, 2V(Calc)=64, 2V(Meas)=61.	Krinovite 
Biaxial (+), a=1.712, b=1.713, g=1.722, bire=0.0100, 2V(Calc)=38, 2V(Meas)=46.  Dispersion very weak.	Tassieite !
Biaxial (-), a=1.713, b=1.743, g=1.749, bire=0.0360	Calcioandyrobertsite-1M !
Biaxial (+), a=1.713, b=1.73, g=1.748, bire=0.0350, 2V(Calc)=90, 2V(Meas)=88.	Gaitite 
Biaxial (?), a=1.713, b=1.721, g=1.734, bire=0.0210, 2V(Calc)=78, 2V(Meas)=90.  Dispersion r < v very strong.	Haradaite 
Biaxial (-), a=1.713, b=1.748, g=1.758, bire=0.0450, 2V(Calc)=54, 2V(Meas)=55-56.	Keiviite-(Y) 
Biaxial (-), a=1.713, b=1.723, g=1.729, bire=0.0160, 2V(Calc)=74, 2V(Meas)=70.	Villyaellenite 
Biaxial (+), a=1.713, b=1.718, g=1.728, bire=0.0150, 2V(Calc)=72, 2V(Meas)=66.	Wicksite 
Biaxial (+), a=1.714, b=1.732, g=1.805, bire=0.0910, 2V(Calc)=56, 2V(Meas)=50.	Lopezite 
Biaxial (+), a=1.714, b=1.744, g=1.783, bire=0.0690, 2V(Calc)=86, 2V(Meas)=60-84.	Nickenichite 
Biaxial (+/-), a=1.708-1.722, b=1.742-1.744, g=1.763-1.773, bire=0.0510-0.0550, 2V(Calc)=74-84, 2V(Meas)=88.  Dispersion none.	Adamite 
Biaxial (-), a=1.715, b=1.73, g=1.735, bire=0.0200	Calcioandyrobertsite-2O !
Biaxial (+), a=1.706-1.724, b=1.708-1.729, g=1.712-1.735, bire=0.0060-0.0110, 2V(Calc)=72-86, 2V(Meas)=14-90.  Dispersion r > v or r < v.	Clinozoisite !
Biaxial (+), a=1.715, b=1.82, g=1.88, bire=0.1650, 2V(Calc)=70, 2V(Meas)=85.	Dolerophanite 
Biaxial (?), a=1.715, b=1.718, g=1.733, bire=0.0180	Dollaseite-(Ce) 
Biaxial (+), a=1.715, b=1.75, g=1.8, bire=0.0850, 2V(Calc)=82, 2V(Meas)=62.  Dispersion strong, r > v.	Erythrosiderite 
Biaxial (-), a=1.715, g=1.73,  bire=0.0150	Hisingerite 
Biaxial (+), a=1.715, b=1.725, g=1.738, bire=0.0230, 2V(Calc)=84, 2V(Meas)=80.	Homilite 
Biaxial (-), a=1.715, b=1.718, g=1.72, bire=0.0050	Jachymovite !
Biaxial (+), a=1.715, b=1.743, g=1.783, bire=0.0680, 2V(Calc)=82, 2V(Meas)=80.	Johillerite 
Biaxial (+), a=1.715, b=1.715, g=1.728, bire=0.0130, 2V(Calc)=0, 2V(Meas)=40-42.	Kanoite 
Biaxial (+), a=1.715, b=1.75, g=1.8, bire=0.0850, 2V(Calc)=82, 2V(Meas)=62.	Kremersite 
Biaxial (-), a=1.712-1.718, b=1.72-1.725, g=1.727-1.734, bire=0.0150-0.0160, 2V(Calc)=84, 2V(Meas)=82.  Dispersion weak, r > v.	Kyanite 
Biaxial (-), a=1.715, b=1.8, g=1.87, bire=0.1550, 2V(Calc)=80, 2V(Meas)=85.	Mandarinoite 
Biaxial (-), a=1.715, b=1.783, g=1.785, bire=0.0700, 2V(Calc)=18, 2V(Meas)=5-10.	Ogdensburgite 
Biaxial (-), a=1.715, b=1.736, g=1.739, bire=0.0240, 2V(Calc)=40, 2V(Meas)=41.  Dispersion r > v.	Renardite 
Biaxial (-), a=1.701-1.729, b=1.703-1.732, g=1.705-1.734, bire=0.0040-0.0050, 2V(Calc)=78-88, 2V(Meas)=51-69.  Dispersion r < v.	Sapphirine 
Biaxial (-), a=1.715, b=1.72, g=1.725, bire=0.0100, 2V(Calc)=88, 2V(Meas)=83.	Trimerite 
Biaxial (+), a=1.716, b=1.73, g=1.746, bire=0.0300, 2V(Calc)=88, 2V(Meas)=78-82.  Dispersion r >> v strong.	Manganbabingtonite 
Biaxial (+), a=1.717, b=1.73, g=1.752, bire=0.0350, 2V(Calc)=76, 2V(Meas)=60-65.  Dispersion relatively strong.	Babingtonite 
Biaxial (+), a=1.709-1.725, b=1.712-1.726, g=1.716-1.732, bire=0.0070, 2V(Calc)=46-82, 2V(Meas)=46-70.  Dispersion r > v strong.	Ottrelite 
Biaxial (-), a=1.717, b=1.728, g=1.735, bire=0.0180	Piergorite-(Ce) !
Biaxial (-), a=1.717, b=1.78, g=1.8, bire=0.0830, 2V(Calc)=56, 2V(Meas)=57.  Dispersion r < v.	Ungarettiite 
Biaxial (-), a=1.718, b=1.748, g=1.748, bire=0.0300	Bleasdaleite !
Biaxial (+), a=1.718, b=1.733, g=1.75, bire=0.0320	Niobokupletskite !
Biaxial (-), a=1.691-1.745, b=1.769-1.773, g=1.773-1.818, bire=0.0730-0.0820, 2V(Calc)=24-80, 2V(Meas)=41-82.	Vinogradovite 
Biaxial (-), a=1.719, b=1.739, g=1.748, bire=0.0290, 2V(Calc)=66, 2V(Meas)=73.  Dispersion r < v moderate.	Fluorthalenite-(Y) !
Biaxial (+), a=1.699-1.739, b=1.705-1.745, g=1.728-1.757, bire=0.0180-0.0290, 2V(Calc)=56-72, 2V(Meas)=58-63.  Dispersion distinct to strong, r > v.	Hedenbergite 
Biaxial (-), a=1.72, b=1.749, g=1.757, bire=0.0370	Andyrobertsite !
Biaxial (?), a=1.72, g=1.74,  bire=0.0200, 2V(Meas)=90.	Arhbarite 
Biaxial (?), a=1.72, g=2.1,  bire=0.3800	Clinocervantite !
Biaxial (-), a=1.72, b=1.8, g=1.8, bire=0.0800, 2V(Calc)=0, 2V(Meas)=0.	Cronstedtite 
Biaxial (-), a=1.72, g=1.75,  bire=0.0300	Ferrotschermakite !
Biaxial (-), a=1.72, b=1.78, g=1.79, bire=0.0700	Franconite 
Biaxial (-), a=1.72, b=1.73, g=1.73, bire=0.0100, 2V(Calc)=0, 2V(Meas)=20-50.  Dispersion relatively strong.	Gageite-2M 
Biaxial (-), a=1.72, b=1.736, g=1.738, bire=0.0180, 2V(Calc)=38, 2V(Meas)=30.	Gittinsite 
Biaxial (-), a=1.72, b=1.798, g=1.805, bire=0.0850, 2V(Calc)=32, 2V(Meas)=35.	Guilleminite 
Biaxial (+), a=1.72, b=1.81, g=1.82, bire=0.1000, 2V(Calc)=34, 2V(Meas)=35.	Hochelagaite 
Biaxial (-), a=1.72, b=1.741, g=1.746, bire=0.0260	Hodgkinsonite 
Biaxial (-), a=1.72, b=1.728, g=1.735, bire=0.0150	Landesite 
Biaxial (?), b=1.72	Magnesiochloritoid 
Biaxial (-), a=1.72, b=1.77, g=1.8, bire=0.0800, 2V(Calc)=72, 2V(Meas)=80-85.	Melonjosephite 
Biaxial (-), a=1.72, b=1.76, g=1.76, bire=0.0400	Metauranopilite 
Biaxial (-), a=1.72, b=1.985, g=1.99, bire=0.2700, 2V(Calc)=14, 2V(Meas)=15-20.	Poughite 
Biaxial (-), a=1.715-1.725, b=1.74-1.745, g=1.745-1.75, bire=0.0250-0.0300, 2V(Calc)=46-52, 2V(Meas)=40-48.	Saneroite 
Biaxial (?), a=1.72	Spertiniite 
Biaxial (-), a=1.72, b=1.868, g=1.953, bire=0.2330, 2V(Calc)=68, 2V(Meas)=48.  Dispersion r < v weak.	Tyuyamunite 
Biaxial (+), a=1.713-1.73, b=1.719-1.734, g=1.723-1.74, bire=0.0100, 2V(Calc)=78-80, 2V(Meas)=36-89.  Dispersion r > v.	Chloritoid 
Biaxial (-), a=1.722, b=1.73, g=1.737, bire=0.0150	Gladiusite !
Biaxial (+), a=1.722, b=1.723, g=1.734, bire=0.0120, 2V(Calc)=34, 2V(Meas)=72.8.	Liebauite 
Biaxial (-), a=1.674-1.77, b=1.855-1.907, g=1.88-1.915, bire=0.1450-0.2060	Strelkinite 
Biaxial (+), a=1.722, g=1.734,  bire=0.0120	Zincostaurolite !
Biaxial (-), a=1.723, b=1.744, g=1.75, bire=0.0270, 2V(Calc)=54, 2V(Meas)=40-44.  Dispersion r > v medium.	Arakiite !
Biaxial (-), a=1.723, b=1.734, g=1.736, bire=0.0130	Gageite 
Biaxial (-), a=1.723, b=1.758, g=1.768, bire=0.0450	Keiviite-(Yb) 
Biaxial (+), a=1.723, b=1.733, g=1.755, bire=0.0320, 2V(Calc)=70, 2V(Meas)=88.	Mukhinite 
Biaxial (-), a=1.723, b=1.737, g=1.756, bire=0.0330	Roselite-beta 
Biaxial (-), a=1.724, b=1.745, g=1.75, bire=0.0260	Bobkingite !
Biaxial (-), a=1.724, b=1.733, g=1.739, bire=0.0150, 2V(Calc)=78, 2V(Meas)=70.	Chalcocyanite 
Biaxial (-), a=1.724, b=1.76, g=1.772, bire=0.0480, 2V(Calc)=58, 2V(Meas)=60.	Niobophyllite 
Biaxial (+), a=1.711-1.738, b=1.714-1.741, g=1.724-1.751, bire=0.0130, 2V(Calc)=58, 2V(Meas)=58-73.  Dispersion none.	Rhodonite 
Biaxial (+), a=1.725, b=1.738, g=1.76, bire=0.0350, 2V(Calc)=76, 2V(Meas)=65.	Hingganite-(Yb) 
Biaxial (-), a=1.725, b=1.74, g=1.741, bire=0.0160, 2V(Calc)=28, 2V(Meas)=34.  Dispersion r > v strong.	Khmaralite !
Biaxial (+), a=1.725, g=1.74,  bire=0.0150	Pseudojohannite !
Biaxial (-), a=1.725, b=1.728, g=1.735, bire=0.0100, 2V(Calc)=68, 2V(Meas)=small.  Dispersion r > v weak.	Roselite 
Biaxial (+), a=1.725, b=1.758, g=1.83, bire=0.1050, 2V(Calc)=72, 2V(Meas)=68.	Seidozerite 
Biaxial (+/-), a=1.71-1.74, b=1.72-1.75, g=1.74-1.76, bire=0.0200-0.0300, 2V(Calc)=72-88, 2V(Meas)=0-90.  Dispersion relatively strong.	Strengite 
Biaxial (-), a=1.725, b=1.83, g=1.845, bire=0.1200, 2V(Calc)=38, 2V(Meas)=39.5.  Dispersion none.	Ternovite !
Biaxial (+), a=1.725, b=1.726, g=1.73, bire=0.0050	Triploidite 
Biaxial (-), a=1.7-1.75	Zinc-zippeite 
Biaxial (-), a=1.705-1.746, b=1.728-1.759, g=1.73-1.761, bire=0.0150-0.0250, 2V(Calc)=32-42, 2V(Meas)=20-55.  Dispersion r < v.	Holtite 
Biaxial (+), a=1.726, b=1.738, g=1.789, bire=0.0630, 2V(Calc)=54, 2V(Meas)=53.  Dispersion relatively strong.	Antlerite 
Biaxial (+), a=1.726, b=1.737, g=1.766, bire=0.0400, 2V(Calc)=66, 2V(Meas)=82.  Dispersion r > v strong.	Innelite 
Biaxial (+), b=1.726, g=1.758, , 2V(Meas)=75.	Kupletskite-(Cs) 
Biaxial (-), a=1.726, b=1.771, g=1.78, bire=0.0540, 2V(Calc)=46, 2V(Meas)=50.	Paradamite 
Biaxial (-), a=1.726, b=1.74, g=1.747, bire=0.0210, 2V(Calc)=70, 2V(Meas)=70.	Strashimirite 
Biaxial (+), a=1.727, b=1.732, g=1.789, bire=0.0620, 2V(Calc)=34, 2V(Meas)=7-40.	Batisite 
Biaxial (+), a=1.727, g=1.738,  bire=0.0110	Ferroalluaudite 
Biaxial (-), a=1.727, b=1.87, g=1.883, bire=0.1560, 2V(Calc)=30, 2V(Meas)=20-30.  Dispersion strong, r < v.	Ilvaite 
Biaxial (-), a=1.727, b=1.771, g=1.798, bire=0.0710	Margarosanite 
Biaxial (-), a=1.715-1.74, b=1.735-1.77, g=1.745-1.83, bire=0.0300-0.0900, 2V(Calc)=68-74, 2V(Meas)=60-90.  Dispersion relatively strong.	Sicklerite 
Biaxial (-), a=1.728, b=1.771, g=1.8, bire=0.0720, 2V(Calc)=76, 2V(Meas)=72.  Dispersion relatively weak.	Brochantite 
Biaxial (-), a=1.728, b=1.749, g=1.751, bire=0.0230	Chloro-potassichastingsite !
Biaxial (?), a=1.729, b=1.738, g=1.741, bire=0.0120, 2V(Calc)=58, 2V(Meas)=54.  Dispersion r < v strong.	Bederite !
Biaxial (+), a=1.729, b=1.802, g=1.852, bire=0.1230, 2V(Calc)=76, 2V(Meas)=72.  Dispersion r < v.	Jinshajiangite 
Biaxial (-), a=1.729, b=1.774, g=1.775, bire=0.0460, 2V(Calc)=16, 2V(Meas)=16.  Dispersion r >> v.	Philipsburgite 
Biaxial (-), a=1.725-1.733, b=1.762-1.772, g=1.769-1.775, bire=0.0420-0.0440, 2V(Calc)=30-46, 2V(Meas)=40-50.	Shuiskite 
Biaxial (-), a=1.7-1.76, b=1.71-1.8, g=1.73-1.813, bire=0.0300-0.0530, 2V(Calc)=58-72, 2V(Meas)=70-110.  Dispersion r > v moderate.	Aegirine-augite *
Biaxial (+), a=1.73, b=1.758, g=1.838, bire=0.1080, 2V(Calc)=64, 2V(Meas)=68.  Dispersion relatively weak.	Azurite 
Biaxial (?), b=1.73	Brabantite ?
Biaxial (-), a=1.73, b=1.87, g=1.91, bire=0.1800, 2V(Calc)=52, 2V(Meas)=30.  Dispersion relatively strong.	Clinoclase 
Biaxial (-), a=1.73, b=1.758, g=1.775, bire=0.0450, 2V(Calc)=74, 2V(Meas)=82.  Dispersion strong, r < v.	Ferrorosemaryite !
Biaxial (-), a=1.73, b=1.96, g=1.98, bire=0.2500	Melanovanadite 
Biaxial (+), a=1.73, b=1.745, g=1.764, bire=0.0340	Phosphoinnelite !
Biaxial (-), a=1.72-1.74, b=1.79-1.8, g=1.85-1.9, bire=0.1300-0.1600, 2V(Calc)=80-82, 2V(Meas)=85.  Dispersion r > v.	Sabinaite 
Biaxial (+), a=1.73, b=1.734, g=1.752, bire=0.0220	Steigerite 
Biaxial (-), a=1.73, b=1.739, g=1.748, bire=0.0180, 2V(Calc)=88, 2V(Meas)=90.	Suzukiite 
Biaxial (-), a=1.73, b=1.738, g=1.738, bire=0.0080	Waterhouseite !
Biaxial (+), a=1.731, b=1.735, g=1.74, bire=0.0090, 2V(Calc)=84, 2V(Meas)=7.	Carboirite-III 
Biaxial (+), a=1.731, b=1.735, g=1.74, bire=0.0090, 2V(Calc)=84, 2V(Meas)=7.  Dispersion r > v strong.	Carboirite-VIII 
Biaxial (-), a=1.731, b=1.755, g=1.755, bire=0.0240, 2V(Calc)=0, 2V(Meas)=small.	Ericaite 
Biaxial (+), a=1.731, b=1.778, g=1.845, bire=0.1140	Pauflerite !
Biaxial (-), a=1.731, b=1.738, g=1.744, bire=0.0130, 2V(Calc)=84, 2V(Meas)=68.	Thalenite-(Y) 
Biaxial (+), a=1.732, b=1.737, g=1.744, bire=0.0120, 2V(Calc)=82, 2V(Meas)=83.	Chambersite 
Biaxial (-), a=1.733, b=1.757, g=1.761, bire=0.0280, 2V(Calc)=42, 2V(Meas)=55.	Garyansellite 
Biaxial (?), a=1.734	Macaulayite 
Biaxial (+), a=1.735, b=1.737, g=1.8, bire=0.0650, 2V(Calc)=22, 2V(Meas)=10-15.	Bario-orthojoaquinite 
Biaxial (+), a=1.735, b=1.741, g=1.758, bire=0.0230, 2V(Calc)=62, 2V(Meas)=64.2.  Dispersion r < v medium.	Dissakisite-(Ce) 
Biaxial (?), a=1.73-1.74, g=1.83-1.84,  bire=0.1000	Gerdtremmelite 
Biaxial (-), a=1.735, b=1.742, g=1.745, bire=0.0100, 2V(Calc)=66, 2V(Meas)=68.  Dispersion r > v.	Hagendorfite 
Biaxial (?), a=1.735, g=1.75,  bire=0.0150	Marecottite !
Biaxial (+/-), a=1.736, b=1.767, g=1.796, bire=0.0600, 2V(Calc)=86, 2V(Meas)=~90.	Arthurite 
Biaxial (-), a=1.736, b=1.755, g=1.766, bire=0.0300, 2V(Calc)=72, 2V(Meas)=medium.	Sursassite 
Biaxial (+), a=1.737, b=1.747, g=1.768, bire=0.0310, 2V(Calc)=70, 2V(Meas)=69.	Creaseyite 
Biaxial (-), a=1.723-1.751, b=1.73-1.784, g=1.736-1.797, bire=0.0130-0.0460, 2V(Calc)=62-84, 2V(Meas)=64-89.  Dispersion strong, r > v.	Epidote !
Biaxial (+), a=1.726-1.748, b=1.728-1.75, g=1.744-1.764, bire=0.0160-0.0180, 2V(Calc)=40-42, 2V(Meas)=35-46.  Dispersion r > v moderate.	Pyroxmangite 
Biaxial (-), a=1.738, b=1.761, g=1.774, bire=0.0360	Arsenuranylite 
Biaxial (-), a=1.738, b=1.743, g=1.746, bire=0.0080, 2V(Calc)=74, 2V(Meas)=67-68.	Surinamite 
Biaxial (+), b=1.738, g=1.779, 	Walentaite 
Biaxial (+), a=1.71-1.767, b=1.723-1.77, g=1.726-1.788, bire=0.0160-0.0210	Ferrosilite 
Biaxial (-), a=1.739, b=1.749, g=1.752, bire=0.0130, 2V(Calc)=56, 2V(Meas)=30.	Przhevalskite 
Biaxial (+), a=1.7395, b=1.7434, g=1.7495, bire=0.0100, 2V(Calc)=78, 2V(Meas)=77.  Dispersion r < v medium.	Dissakisite-(La) !
Biaxial (+), a=1.74, b=1.74, g=1.76, bire=0.0200, 2V(Calc)=0, 2V(Meas)=0.	Andremeyerite 
Biaxial (-), a=1.74, b=1.772-1.78, g=1.775-1.78, bire=0.0350-0.0400, 2V(Calc)=0-32, 2V(Meas)=21-25.	Belyankinite 
Biaxial (+/-), a=1.74, b=1.75, g=1.76, bire=0.0200	Gatehouseite 
Biaxial (-), a=1.74, b=1.81, g=1.81, bire=0.0700, 2V(Calc)=0, 2V(Meas)=18.	Gerasimovskite 
Biaxial (?), b=1.74	Kristiansenite !
Biaxial (+), a=1.74, 2V(Meas)=80.6.  Dispersion RI > 1.74.	Manganiandrosite-(Ce) !
Biaxial (-), a=1.74, b=1.759, g=1.763, bire=0.0230, 2V(Calc)=48, 2V(Meas)=50.  Dispersion dispersion not observed.	Meurigite-Na !
Biaxial (+), a=1.74, b=1.754, g=1.786, bire=0.0460, 2V(Calc)=68, 2V(Meas)=68.	Minasgeraisite-(Y) 
Biaxial (+), a=1.74, b=1.741, g=1.765, bire=0.0250, 2V(Calc)=24, 2V(Meas)=20-23.	Paranatisite 
Biaxial (-), a=1.74, b=1.79, g=1.82, bire=0.0800	Reinerite 
Biaxial (+), a=1.74, g=1.74,  bire=0.0000-0.0100	Scheuchzerite !
Biaxial (-), a=1.74, b=1.855, g=1.855, bire=0.1150	Sinoite 
Biaxial (+/-), a=1.74, g=1.82,  bire=0.0800	Vanadoandrosite-(Ce) !
Biaxial (+), a=1.725-1.756, b=1.73-1.789, g=1.75-1.832, bire=0.0250-0.0760, 2V(Calc)=54-86, 2V(Meas)=50-86.  Dispersion strong, r > v.	Piemontite 
Biaxial (+), a=1.741, b=1.762, g=1.797, bire=0.0560	Cobaltarthurite !
Biaxial (-), a=1.741, b=1.762, g=1.762, bire=0.0210, 2V(Calc)=0, 2V(Meas)=8-12.	Natalyite 
Biaxial (+), a=1.741, b=1.742, g=1.79, bire=0.0490	Wolfeite 
Biaxial (+), a=1.736-1.747, b=1.74-1.754, g=1.745-1.762, bire=0.0090-0.0150, 2V(Calc)=84-88, 2V(Meas)=88.  Dispersion weak to moderate, r > v.	Staurolite 
Biaxial (+), a=1.742-1.743, b=1.754, g=1.776-1.778, bire=0.0340-0.0350, 2V(Calc)=70-74, 2V(Meas)=29-30.  Dispersion r > v.	Barytolamprophyllite 
Biaxial (+), a=1.743, b=1.76, g=1.82, bire=0.0770, 2V(Calc)=58, 2V(Meas)=58-62.	Byelorussite-(Ce) 
Biaxial (-), a=1.743, b=1.754, g=1.764, bire=0.0210	Caracolite 
Biaxial (-), a=1.743, b=1.773, g=1.78, bire=0.0370	Lasalite !
Biaxial (-), a=1.743, b=1.785, g=1.81, bire=0.0670, 2V(Calc)=72, 2V(Meas)=72 -84.  Dispersion r > v moderate.	Normandite !
Biaxial (+), a=1.743, b=1.8, g=1.88, bire=0.1370	Tundrite-(Ce) 
Biaxial (+), a=1.745, b=1.748, g=1.754, bire=0.0090, 2V(Calc)=72, 2V(Meas)=45.  Dispersion none.	Chrysoberyl 
Biaxial (-), a=1.745, b=1.805, g=1.84, bire=0.0950, 2V(Calc)=72, 2V(Meas)=70.	Gysinite-(Nd) 
Biaxial (+), a=1.745, b=1.777, g=1.84, bire=0.0950	Nickelzippeite 
Biaxial (+), a=1.745, b=1.753, g=1.778, bire=0.0330, 2V(Calc)=60, 2V(Meas)=60.	Odanielite 
Biaxial (+), a=1.725-1.765, b=1.755-1.775, g=1.815-1.835, bire=0.0700-0.0900, 2V(Calc)=46-74, 2V(Meas)=60.	Olmsteadite 
Biaxial (-), a=1.745, b=1.755, g=1.76, bire=0.0150, 2V(Calc)=70, 2V(Meas)=71.  Dispersion strong, r < v.	Rollandite !
Biaxial (?), a=1.745, g=1.7455,  bire=0.0005	Tinticite 
Biaxial (+), a=1.745, b=1.751, g=1.76, bire=0.0150, 2V(Calc)=80, 2V(Meas)=38-46.	Tiragalloite 
Biaxial (+), a=1.744-1.748, b=1.752-1.765, g=1.75-1.783, bire=0.0060-0.0350, 2V(Meas)=80.  Dispersion rHingganite-(Y) 
Biaxial (+), a=1.746, b=1.754, g=1.779, bire=0.0330, 2V(Calc)=60, 2V(Meas)=21-43.	Lamprophyllite 
Biaxial (-), a=1.746, b=1.769, g=1.837, bire=0.0910, 2V(Calc)=64, 2V(Meas)=15-20.	Namansilite 
Biaxial (+), a=1.746, b=1.748, g=1.768, bire=0.0220, 2V(Calc)=36, 2V(Meas)=34.  Dispersion r > v.	Prosperite 
Biaxial (+), a=1.739-1.753, b=1.749-1.761, g=1.77-1.782, bire=0.0290-0.0310, 2V(Calc)=64-70, 2V(Meas)=45-77.	Titantaramellite 
Biaxial (-), a=1.747, b=1.779, g=1.84, bire=0.0930	Cobaltzippeite 
Biaxial (-), a=1.73-1.764, b=1.82-1.889, g=1.93-1.936, bire=0.1720-0.2000, 2V(Calc)=58-90, 2V(Meas)=60.	Iriginite 
Biaxial (+), a=1.747, b=1.765, g=1.78, bire=0.0330, 2V(Calc)=84, 2V(Meas)=60-70.	Joesmithite 
Biaxial (+), a=1.747, b=1.753, g=1.768, bire=0.0210, 2V(Calc)=66, 2V(Meas)=75.	Warikahnite 
Biaxial (+), a=1.748, b=1.763, g=1.84, bire=0.0920, 2V(Calc)=50, 2V(Meas)=53.	Johnwalkite 
Biaxial (+), a=1.748, b=1.772, g=1.798, bire=0.0500, 2V(Calc)=90, 2V(Meas)=86-89.  Dispersion r > v strong.	Maxwellite 
Biaxial (-), a=1.72-1.778, b=1.74-1.819, g=1.757-1.839, bire=0.0370-0.0610, 2V(Calc)=68-84, 2V(Meas)=60-90.  Dispersion r > v.	Aegirine 
Biaxial (-), a=1.75, b=1.87, g=1.88, bire=0.1300	Becquerelite 
Biaxial (+), a=1.72-1.78, b=1.73-1.79, g=1.87-2.05, bire=0.1500-0.2700, 2V(Calc)=26-32, 2V(Meas)=5-28.  Dispersion r < v marked.	Ferrimolybdite 
Biaxial (?), b=1.75	Hingganite-(Ce) 
Biaxial (+), a=1.75, b=1.766, g=1.85, bire=0.1000	Komarovite 
Biaxial (+), a=1.75, b=1.755, g=1.799, bire=0.0490, 2V(Calc)=38, 2V(Meas)=40.  Dispersion r > v strong.	Nabalamprophyllite !
Biaxial (+), a=1.75, b=1.753, g=1.78, bire=0.0300, 2V(Calc)=38, 2V(Meas)=30.	Nagashimalite 
Biaxial (+/-), a=1.75, g=1.95,  bire=0.2000, 2V(Meas)=90.	Ravatite 
Biaxial (?), a=1.75, b=1.79, g=1.8, bire=0.0500	Serrabrancaite !
Biaxial (+), a=1.748-1.754, b=1.76-1.767, g=1.762-1.823, bire=0.0140-0.0690	Joaquinite-(Ce) 
Biaxial (-), a=1.751, b=1.771, g=1.782, bire=0.0310	Leucophoenicite 
Biaxial (+), a=1.748-1.754, b=1.76-1.767, g=1.762-1.823, bire=0.0140-0.0690, 2V(Calc)=44-54, 2V(Meas)=40.	Orthojoaquinite-(Ce) 
Biaxial (+), a=1.746-1.756, b=1.75-1.758, g=1.764-1.768, bire=0.0120-0.0180, 2V(Calc)=50-58, 2V(Meas)=30-40.	Pyroxferroite 
Biaxial (-), a=1.752, b=1.775, g=1.796, bire=0.0440, 2V(Calc)=86, 2V(Meas)=88.	Luetheite 
Biaxial (+), a=1.752, b=1.795, g=1.8, bire=0.0480, 2V(Calc)=36, 2V(Meas)=40-50.	Pumpellyite-(Mn++) 
Biaxial (-), a=1.715-1.791, b=1.718-1.815, g=1.733-1.822, bire=0.0180-0.0310, 2V(Calc)=50-56, 2V(Meas)=40-80.  Dispersion distinct to strong, r > v.	Allanite-(Ce) 
Biaxial (-), a=1.715-1.791, b=1.718-1.815, g=1.733-1.822, bire=0.0180-0.0310, 2V(Calc)=50-56, 2V(Meas)=40-80.  Dispersion distinct to strong, r > v.	Allanite-(Y) 
Biaxial (+), a=1.753, b=1.763, g=1.791, bire=0.0380, 2V(Calc)=64, 2V(Meas)=63.	Chestermanite 
Biaxial (-), a=1.753, b=1.824, g=1.83, bire=0.0770, 2V(Calc)=30, 2V(Meas)=31.	Iimoriite-(Y) 
Biaxial (+), a=1.753, b=1.782, g=1.815, bire=0.0620	Shattuckite 
Biaxial (+), a=1.754, b=1.76, g=1.797, bire=0.0430	Orthojoaquinite-(La) !
Biaxial (-), a=1.755, b=1.772, g=1.774, bire=0.0190, 2V(Calc)=36, 2V(Meas)=0.	Allactite 
Biaxial (-), a=1.755, b=1.76, g=1.765, bire=0.0100	Allanite-(La) !
Biaxial (-), a=1.755, g=1.79,  bire=0.0350	Phosphofibrite 
Biaxial (-), a=1.755, b=1.785, g=1.785, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0.	Theisite 
Biaxial (+/-), a=1.75-1.761, g=1.763-1.772,  bire=0.0110-0.0130, 2V(Meas)=80-92.	Tadzhikite-(Ce) 
Biaxial (+/-), a=1.75-1.761, g=1.763-1.772,  bire=0.0110-0.0130	Tadzhikite-(Y) !
Biaxial (-), a=1.756, b=1.78, g=1.792, bire=0.0360, 2V(Calc)=68, 2V(Meas)=72.  Dispersion r > v.	Alleghanyite 
Biaxial (?), a=1.756, g=1.775,  bire=0.0190	Natrodufrenite 
Biaxial (-), a=1.756, b=1.764, g=1.765, bire=0.0090, 2V(Calc)=38, 2V(Meas)=35.  Dispersion strong, r > v.	Nielsbohrite !
Biaxial (-), a=1.756, b=1.793, g=1.809, bire=0.0530, 2V(Calc)=64, 2V(Meas)=65.	Thortveitite 
Biaxial (+), a=1.757, b=1.763, g=1.773, bire=0.0160, 2V(Calc)=76, 2V(Meas)=76.	Ferrisurite 
Biaxial (-), a=1.757, b=1.8, g=1.8, bire=0.0430	Sailaufite !
Biaxial (+), a=1.757, b=1.778, g=2.04, bire=0.2830	Vajdakite !
Biaxial (+), a=1.758, b=1.776, g=1.795, bire=0.0370, 2V(Calc)=90, 2V(Meas)=68-83.  Dispersion r > v very strong.	Orientite 
Biaxial (-), a=1.758, b=1.796, g=1.81, bire=0.0520, 2V(Calc)=60, 2V(Meas)=64.	Tlalocite 
Biaxial (+), a=1.759, b=1.763, g=1.783, bire=0.0240, 2V(Calc)=50, 2V(Meas)=47.	Austinite 
Biaxial (+), a=1.759, b=1.797, g=1.86, bire=0.1010, 2V(Calc)=78, 2V(Meas)=60-70.  Dispersion none.	Tephroite 
Biaxial (?), a=1.76, b=1.8, g=1.805, bire=0.0450, 2V(Calc)=38, 2V(Meas)=37.	Billietite 
Biaxial (-), a=1.76, b=1.92, g=1.96, bire=0.2000	Bradaczekite !
Biaxial (-), a=1.76, b=1.84, g=1.87, bire=0.1100	Calciouranoite 
Biaxial (?), a=1.76, g=1.92,  bire=0.1600	Cianciulliite 
Biaxial (-), a=1.76, b=1.8, g=1.83, bire=0.0700, 2V(Calc)=80, 2V(Meas)=77.  Dispersion r > v.	Gilmarite !
Biaxial (?), b=1.76	Wadsleyite 
Biaxial (-), a=1.76-1.762, b=1.767-1.768, g=1.768-1.77, bire=0.0080, 2V(Calc)=40-58, 2V(Meas)=large.	Dewindtite 
Biaxial (-), a=1.762, b=1.77, g=1.774, bire=0.0120	Esperite 
Biaxial (+), a=1.762, b=1.763, g=1.766, bire=0.0040, 2V(Calc)=62, 2V(Meas)=5-15.  Dispersion very strong, r > v.	Mendozavilite 
Biaxial (+), a=1.762, b=1.767, g=1.825, bire=0.0630, 2V(Calc)=34, 2V(Meas)=37.	Paulkellerite 
Biaxial (+), b=1.763	Piemontite-(Sr) !
Biaxial (+), a=1.763, b=1.777, g=1.785, bire=0.0220, 2V(Calc)=72, 2V(Meas)=85-90.	Yoshimuraite 
Biaxial (+), a=1.764, b=1.767, g=1.792, bire=0.0280, 2V(Calc)=40, 2V(Meas)=25.	Clinoferrosilite 
Biaxial (+), b=1.74-1.79, 2V(Meas)=0-70.  Dispersion strong, r > v.	Ardennite-(As) 
Biaxial (-), a=1.75-1.78, b=1.901-2.06, g=1.92-2.08, bire=0.1700-0.3000, 2V(Calc)=26-36, 2V(Meas)=43-60.  Dispersion none.	Carnotite 
Biaxial (+/-), a=1.73-1.8, b=1.795-1.831, g=1.771-1.846, bire=0.0410-0.0460	Conichalcite 
Biaxial (-), a=1.765, b=1.81, g=1.82, bire=0.0550, 2V(Calc)=48, 2V(Meas)=33.	Cornetite 
Biaxial (-), a=1.765, b=1.778, g=1.787, bire=0.0220, 2V(Calc)=78, 2V(Meas)=75.5-82.	Sonolite 
Biaxial (-), a=1.765, b=1.792, g=1.8, bire=0.0350, 2V(Calc)=56, 2V(Meas)=90.  Dispersion strong.	Vandenbrandeite 
Biaxial (-), a=1.764-1.767, b=1.783-1.785, g=1.798-1.802, bire=0.0340-0.0350	Malayaite 
Biaxial (?), a=1.766, g=1.781,  bire=0.0150	Kosmochlor 
Biaxial (+), a=1.766, b=1.773, g=1.788, bire=0.0220, 2V(Calc)=70, 2V(Meas)=69.  Dispersion r > v slight.	Retzian-(La) 
Biaxial (+), a=1.767, b=1.793, g=1.871, bire=0.1040, 2V(Calc)=64, 2V(Meas)=60-65.  Dispersion strong, r > v.	Strakhovite 
Biaxial (-), a=1.767, b=1.782, g=1.791, bire=0.0240, 2V(Calc)=74, 2V(Meas)=36.	Teineite 
Biaxial (-), a=1.75-1.785, b=1.91-1.952, g=1.945-2.002, bire=0.1950-0.2170, 2V(Calc)=46-52, 2V(Meas)=52.	Francevillite 
Biaxial (+), a=1.768, b=1.771, g=1.818, bire=0.0500	Monazite-(Sm) !
Biaxial (-), a=1.768, b=1.804, g=1.81, bire=0.0420	Poppiite !
Biaxial (+), a=1.769, b=1.77, g=1.785, bire=0.0160, 2V(Calc)=30, 2V(Meas)=30.33.  Dispersion r > v distinct.	Holdenite 
Biaxial (-), a=1.769, b=1.802, g=1.807, bire=0.0380, 2V(Calc)=40, 2V(Meas)=45.  Dispersion r < v crossed.	Magnesiopascoite !
Biaxial (+), a=1.77, g=1.835,  bire=0.0650, 2V(Meas)=70.	Barbosalite 
Biaxial (-), a=1.77, b=1.816, g=1.856, bire=0.0860	Calcurmolite 
Biaxial (-), a=1.77, b=1.85, g=1.89, bire=0.1200	Derriksite 
Biaxial (+), a=1.77, b=1.79, g=1.82, bire=0.0500	Gadolinite-(Y) 
Biaxial (-), a=1.77, b=2.18, g=2.35-2.4, bire=0.5800-0.6300	Hewettite 
Biaxial (+), a=1.77, b=1.828, g=1.91, bire=0.1400, 2V(Calc)=84, 2V(Meas)=80.	Janhaugite 
Biaxial (+/-), a=1.76-1.78, b=1.78-1.982, g=2.05-2.15, bire=0.2900-0.3700	Karpatite 
Biaxial (+), a=1.77, b=1.78, g=1.8, bire=0.0300, 2V(Calc)=72, 2V(Meas)=71.	Medaite 
Biaxial (+), a=1.77, g=1.778,  bire=0.0080	Nickelaustinite 
Biaxial (-), a=1.77, b=1.925, g=1.97, bire=0.2000, 2V(Calc)=52, 2V(Meas)=58.  Dispersion r << v.	Rankachite 
Biaxial (-), a=1.77, b=1.92-1.94, g=1.94, bire=0.1700, 2V(Calc)=0-36, 2V(Meas)=~37.  Dispersion r < v strong.	Sengierite 
Biaxial (+), a=1.77, b=1.774, g=1.83, bire=0.0600, 2V(Calc)=32, 2V(Meas)=77.  Dispersion r > v distinct.	Taramellite 
Biaxial (-), b=1.77	Uedaite-(Ce) !
Biaxial (-), a=1.772, b=1.783, g=1.789, bire=0.0170, 2V(Calc)=72, 2V(Meas)=72.  Dispersion r > v moderate.	Jerrygibbsite 
Biaxial (+), a=1.772, b=1.785-1.81, g=1.863, bire=0.0910, 2V(Calc)=46-84, 2V(Meas)=80-90.  Dispersion relatively strong.	Olivenite 
Biaxial (-), a=1.773, b=1.79, g=1.803, bire=0.0300, 2V(Calc)=80, 2V(Meas)=83.  Dispersion r < v medium.	Khristovite-(Ce) 
Biaxial (-), a=1.773-1.775, b=1.795, g=1.81-1.815, bire=0.0370-0.0400, 2V(Calc)=78-88, 2V(Meas)=86.	Macfallite 
Biaxial (+), a=1.774, b=1.782, g=1.798, bire=0.0240, 2V(Calc)=72, 2V(Meas)=69.  Dispersion r < v weak.	Retzian-(Nd) 
Biaxial (+), a=1.775, b=1.786, g=1.815, bire=0.0400, 2V(Calc)=66, 2V(Meas)=30-60.  Dispersion relatively weak.	Beraunite 
Biaxial (-), a=1.775, b=1.798, g=1.8, bire=0.0250, 2V(Calc)=32, 2V(Meas)=25.  Dispersion r < v strong.	Bostwickite 
Biaxial (+), a=1.775, b=1.8, g=1.846, bire=0.0710	Botallackite 
Biaxial (-), a=1.775, b=1.84, g=1.855, bire=0.0800, 2V(Calc)=48, 2V(Meas)=22.  Dispersion relatively strong.	Chalcosiderite 
Biaxial (-), a=1.775, b=1.803, g=1.812, bire=0.0370, 2V(Calc)=58, 2V(Meas)=55.	Giniite 
Biaxial (+), a=1.72-1.83, b=1.8-1.87, g=1.89-1.98, bire=0.1500-0.1700, 2V(Calc)=66-88, 2V(Meas)=70.	Helmutwinklerite 
Biaxial (-), a=1.775, b=1.815, g=1.825, bire=0.0500, 2V(Calc)=52, 2V(Meas)=50.  Dispersion r > v very strong.	Pascoite 
Biaxial (-), a=1.775, b=1.82, g=1.82, bire=0.0450, 2V(Calc)=0, 2V(Meas)=8.	Robertsite 
Biaxial (+), a=1.775, b=1.792, g=1.814, bire=0.0390, 2V(Calc)=84, 2V(Meas)=74-80.	Taikanite 
Biaxial (-), a=1.775, b=1.9, g=1.92, bire=0.1450, 2V(Calc)=40, 2V(Meas)=41.  Dispersion low.	Xocomecatlite 
Biaxial (-), a=1.7755, b=1.7985, g=1.8205, bire=0.0450, 2V(Calc)=86, 2V(Meas)=86-96.	Bruggenite 
Biaxial (+), a=1.776, b=1.78, g=1.805, bire=0.0290, 2V(Calc)=46, 2V(Meas)=41.  Dispersion r > v slight.	Caryinite 
Biaxial (-), a=1.776, b=1.814, g=1.836, bire=0.0600	Julgoldite-(Fe++) 
Biaxial (-), a=1.776, b=1.814, g=1.836, bire=0.0600	Julgoldite-(Fe+++) 
Biaxial (+), a=1.777, g=1.802,  bire=0.0250	Cobaltaustinite 
Biaxial (+), a=1.777, b=1.788, g=1.8, bire=0.0230	Retzian-(Ce) 
Biaxial (-), a=1.731-1.824, b=1.76-1.864, g=1.773-1.875, bire=0.0420-0.0510, 2V(Calc)=54-66, 2V(Meas)=74-47.  Dispersion weak, r > v.	Fayalite 
Biaxial (+), a=1.779, b=1.78, g=1.817, bire=0.0380, 2V(Calc)=20, 2V(Meas)=17-20.	Cheralite-(Ce) ?
Biaxial (-), a=1.779, b=1.786, g=1.79, bire=0.0110, 2V(Calc)=72, 2V(Meas)=78.	Kolicite 
Biaxial (+), a=1.78, b=1.802, g=1.805, bire=0.0250	Aluminomagnesiohulsite !
Biaxial (+), a=1.78, b=1.79, g=1.85, bire=0.0700, 2V(Calc)=46, 2V(Meas)=48.  Dispersion r > v distinct.	Cobaltlotharmeyerite !
Biaxial (?), a=1.78, g=1.79,  bire=0.0100	Comancheite 
Biaxial (-), a=1.78, g=1.82,  bire=0.0400	Hogtuvaite 
Biaxial (-), a=1.78, b=1.795, g=1.805, bire=0.0250, 2V(Calc)=76, 2V(Meas)=78.	Jarosewichite 
Biaxial (+), a=1.78, b=1.8, , 2V(Meas)=30-40.	Metamunirite 
Biaxial (-), a=1.78, b=1.85, g=1.86, bire=0.0800, 2V(Calc)=40, 2V(Meas)=60.	Metavandendriesscheite 
Biaxial (+), a=1.78, b=1.785, g=1.8, bire=0.0200	Meurigite-K !
Biaxial (+), a=1.78, b=1.792, g=1.808, bire=0.0280, 2V(Calc)=84, 2V(Meas)=83.	Ribbeite 
Biaxial (?), a=1.78	Riomarinaite !
Biaxial (-), a=1.78, b=1.85, g=1.86, bire=0.0800, 2V(Calc)=40, 2V(Meas)=60.	Vandendriesscheite 
Biaxial (+), a=1.781, b=1.792, g=1.81, bire=0.0290, 2V(Calc)=78, 2V(Meas)=75.  Dispersion strong, r > v.	Vastmanlandite-(Ce) !
Biaxial (+), a=1.782, b=1.802, g=1.835, bire=0.0530, 2V(Calc)=78, 2V(Meas)=50-90.  Dispersion r > v moderate.	Alluaudite 
Biaxial (+), a=1.782, b=1.797, g=1.85, bire=0.0680, 2V(Calc)=58, 2V(Meas)=60.  Dispersion extreme.	Betpakdalite 
Biaxial (-), a=1.782, b=1.82, g=1.827, bire=0.0450	Okhotskite-(Mn++) 
Biaxial (-), a=1.782, b=1.833, g=1.867, bire=0.0850, 2V(Calc)=76, 2V(Meas)=76.3.	Reichenbachite 
Biaxial (-), b=1.78-1.785, g=1.78-1.785, , 2V(Meas)=37-42.	Marthozite 
Biaxial (-), a=1.783, b=1.834, g=1.866, bire=0.0830	Delrioite 
Biaxial (+), a=1.783, b=1.801, g=1.834, bire=0.0510	Flinkite 
Biaxial (+), a=1.784, b=1.785, g=1.79, bire=0.0060, 2V(Calc)=50, 2V(Meas)=40-50.	Grischunite 
Biaxial (-), a=1.785, b=1.81, g=1.82, bire=0.0350, 2V(Calc)=62, 2V(Meas)=66.  Dispersion r < v weak.	Biraite-(Ce) !
Biaxial (+), a=1.785, b=1.814, g=1.854, bire=0.0690, 2V(Calc)=84, 2V(Meas)=~85.  Dispersion r < v weak.	Manganlotharmeyerite !
Biaxial (-), a=1.785, b=1.895, g=1.915, bire=0.1300, 2V(Calc)=44, 2V(Meas)=50.	Masuyite 
Biaxial (-), a=1.785, b=1.85, g=1.85, bire=0.0650, 2V(Calc)=0, 2V(Meas)=5-10.	Mitridatite 
Biaxial (+), a=1.77-1.8, b=1.7705-1.802, g=1.83-1.85, bire=0.0500-0.0600, 2V(Calc)=12-24, 2V(Meas)=12.	Monazite-(La) 
Biaxial (+), a=1.77-1.8, b=1.7705-1.802, g=1.83-1.85, bire=0.0500-0.0600	Monazite-(Nd) 
Biaxial (-), a=1.785, b=1.81, g=1.82, bire=0.0350, 2V(Calc)=62, 2V(Meas)=66.  Dispersion r << v strong.	Perraultite 
Biaxial (+/-), a=1.786, g=1.84,  bire=0.0540	Ludjibaite 
Biaxial (-), a=1.786, b=2.07, g=2.075, bire=0.2890, 2V(Calc)=12, 2V(Meas)=0-5.  Dispersion r > v extreme.	Salesite 
Biaxial (-), a=1.787, b=1.81, g=1.816, bire=0.0290, 2V(Calc)=52, 2V(Meas)=53.433.	Arsenoclasite 
Biaxial (-), a=1.787, b=1.8, g=1.805, bire=0.0180	Kidwellite 
Biaxial (+), a=1.78-1.8, b=1.8-1.82, g=1.87-1.9, bire=0.0900-0.1000, 2V(Calc)=56-60, 2V(Meas)=27-55.  Dispersion single.	Aenigmatite 
Biaxial (+), a=1.79, b=1.825, g=1.982, bire=0.1920, 2V(Calc)=54, 2V(Meas)=54.	Delindeite 
Biaxial (-), a=1.79, b=1.81, g=1.83, bire=0.0400, 2V(Calc)=88, 2V(Meas)=50.  Dispersion r > v perceptible.	Epidote-(Pb) !
Biaxial (-), a=1.79, b=1.805, g=1.82, bire=0.0300, 2V(Calc)=88, 2V(Meas)=85.	Ferrisicklerite 
Biaxial (+), a=1.79, b=1.793-1.794, g=1.82, bire=0.0300, 2V(Calc)=38-44, 2V(Meas)=40-45.  Dispersion r << v.	Kryzhanovskite 
Biaxial (?), a=1.79	Mourite 
Biaxial (-), a=1.79, b=1.85, g=1.89, bire=0.1000, 2V(Calc)=76, 2V(Meas)=80.	Mroseite 
Biaxial (+), a=1.79, b=1.798, g=1.811, bire=0.0210, 2V(Calc)=78, 2V(Meas)=81.  Dispersion extreme.	Obradovicite 
Biaxial (-), a=1.79, b=1.81, g=1.83, bire=0.0400, 2V(Calc)=88, 2V(Meas)=84.	Pararobertsite 
Biaxial (?), b=1.79	Sedovite 
Biaxial (-), a=1.79, b=1.858, g=1.888, bire=0.0980, 2V(Calc)=64, 2V(Meas)=65.  Dispersion r < v strong.	Surkhobite !
Biaxial (+), a=1.79, b=1.79, g=1.9, bire=0.1100, 2V(Calc)=0, 2V(Meas)=10.	Wilkinsonite 
Biaxial (-), a=1.791, b=1.856, g=1.867, bire=0.0760, 2V(Calc)=42, 2V(Meas)=48.	Pseudomalachite 
Biaxial (-), a=1.792, b=1.798, g=1.802, bire=0.0100, 2V(Calc)=78, 2V(Meas)=79.	Franklinfurnaceite 
Biaxial (+), a=1.792, b=1.794, g=1.821, bire=0.0290, 2V(Calc)=32, 2V(Meas)=30.	Jimboite 
Biaxial (+), a=1.792, b=1.84, g=1.888, bire=0.0960, 2V(Calc)=86, 2V(Meas)=90.	Lautarite 
Biaxial (?), a=1.792, g=1.81,  bire=0.0180	Natrobetpakdalite 
Biaxial (+), a=1.785-1.8, b=1.787-1.801, g=1.837-1.849, bire=0.0490-0.0520, 2V(Calc)=18-24, 2V(Meas)=6-25.  Dispersion r > v or r < v.	Monazite-(Ce) 
Biaxial (-), a=1.793, b=1.803, g=1.808, bire=0.0150, 2V(Calc)=70, 2V(Meas)=70-80.  Dispersion r << v.	Perloffite 
Biaxial (-), a=1.793, b=1.807, g=1.809, bire=0.0160, 2V(Calc)=40, 2V(Meas)=83.	Sarkinite 
Biaxial (-), a=1.795, b=1.815, g=1.825, bire=0.0300, 2V(Calc)=68, 2V(Meas)=77.	Esseneite 
Biaxial (-), a=1.795, b=1.842, g=1.874, bire=0.0790, 2V(Calc)=76, 2V(Meas)=80.	Stranskiite 
Biaxial (+), a=1.795, b=1.81, g=1.835, bire=0.0400, 2V(Calc)=78, 2V(Meas)=74.	Tavorite 
Biaxial (?), a=1.797, g=1.856,  bire=0.0590	Ansermetite !
Biaxial (-), a=1.786-1.808, b=1.813-1.835, g=1.852-1.862, bire=0.0540-0.0660, 2V(Calc)=82-88, 2V(Meas)=54-86.	Bafertisite 
Biaxial (-), a=1.797	Barnesite 
Biaxial (?), a=1.797, b=1.805-1.815, g=1.828, bire=0.0310, 2V(Calc)=62-80, 2V(Meas)=very large.  Dispersion r > v medium.	Gottlobite !
Biaxial (+), a=1.797, b=1.804, g=1.815, bire=0.0180, 2V(Calc)=78, 2V(Meas)=80.	Lotharmeyerite 
Biaxial (-), b=1.798, g=1.802, , 2V(Meas)=10-15.	Compreignacite 
Biaxial (+), a=1.799, b=1.822, g=1.855, bire=0.0560	Azoproite 
Biaxial (?), a=1.799, g=1.86,  bire=0.0610	Makarochkinite !
Biaxial (?), b=1.8	Belloite !
Biaxial (?), a=1.8, g=1.81,  bire=0.0100	Cassagnaite !
Biaxial (?), a=1.8, g=1.87,  bire=0.0700	Keyite 
Biaxial (-), a=1.8, b=1.86-1.87, g=1.9, bire=0.1000	Mrazekite 
Biaxial (+), a=1.8, b=1.81, g=1.87, bire=0.0700	Nickellotharmeyerite !
Biaxial (-), a=1.8, b=1.84, g=1.86, bire=0.0600	Radovanite !
Biaxial (-), a=1.8, g=1.9,  bire=0.1000, 2V(Meas)=46.  Dispersion r > v.	Rouseite 
Biaxial (+), a=1.802, b=1.84, g=1.888, bire=0.0860, 2V(Calc)=86, 2V(Meas)=50.	Orthoericssonite 
Biaxial (+), a=1.795-1.81, b=1.806-1.825, g=1.83-1.845, bire=0.0350, 2V(Calc)=70-84, 2V(Meas)=50-90.  Dispersion r > v extreme.	Rhonite 
Biaxial (-), a=1.803, b=2.074, g=2.076, bire=0.2730, 2V(Calc)=8, 2V(Meas)=8-14.  Dispersion relatively strong.	Cerussite 
Biaxial (-), a=1.803, g=1.81,  bire=0.0070	Reppiaite 
Biaxial (-), a=1.803, b=1.905, g=1.945, bire=0.1420, 2V(Calc)=60, 2V(Meas)=63.	Widenmannite 
Biaxial (+), a=1.802-1.807, b=1.833-1.84, g=1.888-1.891, bire=0.0840-0.0860, 2V(Calc)=76-80, 2V(Meas)=30.	Ericssonite 
Biaxial (-), b=1.8-1.81, 2V(Meas)=15-40.	Muskoxite 
Biaxial (+), a=1.806, b=1.809, g=1.83, bire=0.0240	Warwickite 
Biaxial (?), a=1.807, g=1.891,  bire=0.0840	Spriggite !
Biaxial (+), a=1.808, b=1.812, g=1.838, bire=0.0300	Tornebohmite-(La) 
Biaxial (-), a=1.809, b=1.838, g=1.859, bire=0.0500, 2V(Calc)=78, 2V(Meas)=80.  Dispersion relatively weak.	Linarite 
Biaxial (-), a=1.809, b=1.876, g=1.912, bire=0.1030, 2V(Calc)=70, 2V(Meas)=72.  Dispersion r >> v.	Natrokomarovite *
Biaxial (-), a=1.81, b=1.87, g=1.92, bire=0.1100	Bahianite 
Biaxial (+), a=1.81, b=1.825, g=1.92, bire=0.1100, 2V(Calc)=46, 2V(Meas)=40-45.	Gasparite-(Ce) 
Biaxial (-), b=1.81	Hummerite 
Biaxial (-), b=1.81	Kegelite 
Biaxial (-), a=1.81, b=1.923, g=1.933, bire=0.1230, 2V(Calc)=30, 2V(Meas)=5-7.	Kolfanite 
Biaxial (-), b=1.79-1.83, g=1.79-1.83, , 2V(Meas)=60-65.	Protasite 
Biaxial (+), a=1.75-1.87, b=1.751-1.88, g=1.761-1.93, bire=0.0110-0.0600, 2V(Calc)=36-50, 2V(Meas)=37-40.  Dispersion r > v.	Synadelphite 
Biaxial (+), a=1.81, b=1.82, g=1.86, bire=0.0500, 2V(Calc)=56, 2V(Meas)=57.  Dispersion r > v marked.	Theoparacelsite !
Biaxial (+/-), a=1.81, b=1.81, g=1.83, bire=0.0200, 2V(Calc)=0, 2V(Meas)=45.	Welshite 
Biaxial (+), a=1.812, b=1.815, g=1.85, bire=0.0380, 2V(Calc)=34, 2V(Meas)=30-50.	Cornwallite 
Biaxial (-), a=1.814, b=1.846, g=1.867, bire=0.0530, 2V(Calc)=76, 2V(Meas)=76-76.8.	Hejtmanite 
Biaxial (?), b=1.81-1.82	Anthoinite 
Biaxial (-), a=1.815, b=1.898, g=1.898, bire=0.0830	Arseniosiderite 
Biaxial (-), a=1.815, b=1.84, g=1.84, bire=0.0250	Lourenswalsite 
Biaxial (-), a=1.817, b=1.829, g=1.837, bire=0.0200, 2V(Calc)=78, 2V(Meas)=80-85.  Dispersion strong.	Johntomaite !
Biaxial (+), a=1.817, b=1.879, g=2.057, bire=0.2400	Uvanite 
Biaxial (-), a=1.818, b=1.866, g=1.909, bire=0.0910, 2V(Calc)=84, 2V(Meas)=85.  Dispersion none.	Caledonite 
Biaxial (-), a=1.82, b=1.85, g=1.85, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0-5.	Burckhardtite 
Biaxial (-), a=1.82, b=1.84, g=1.86, bire=0.0400, 2V(Calc)=88, 2V(Meas)=90.	Dorrite 
Biaxial (?), a=1.82, b=1.82, , 2V(Meas)=5-10.  Dispersion small.	Fianelite !
Biaxial (+), a=1.82, b=1.86, g=1.99, bire=0.1700, 2V(Calc)=62, 2V(Meas)=51.	Fredrikssonite 
Biaxial (-), a=1.82	Grantsite 
Biaxial (+/-), a=1.82, 2V(Meas)=63.	Hennomartinite 
Biaxial (-), a=1.82, b=1.92, g=1.955, bire=0.1350, 2V(Calc)=58, 2V(Meas)=30.	Lazarenkoite 
Biaxial (-), a=1.82, b=1.854, g=1.888, bire=0.0680, 2V(Calc)=88, 2V(Meas)=80.	Liebenbergite 
Biaxial (-), a=1.82, b=1.845, g=1.85, bire=0.0300, 2V(Calc)=46, 2V(Meas)=46.  Dispersion distinct to strong, r > v.	Noelbensonite !
Biaxial (-), a=1.825, b=1.842, g=1.857, bire=0.0320, 2V(Calc)=84, 2V(Meas)=86.	Dietzeite 
Biaxial (-), a=1.825, b=1.855, g=1.88, bire=0.0550	Ferriallanite-(Ce) !
Biaxial (+), b=1.825	Manganipiemontite-(Sr) !
Biaxial (-), a=1.83, b=1.85, g=1.88, bire=0.0500, 2V(Calc)=80, 2V(Meas)=75.  Dispersion strong, r < v.	Clinoatacamite !
Biaxial (+), a=1.83, b=1.835, g=1.87, bire=0.0400, 2V(Calc)=44, 2V(Meas)=40.  Dispersion r > v distinct.	Ferrilotharmeyerite 
Biaxial (+), a=1.83, b=1.834, g=1.89, bire=0.0600	Lukrahnite !
Biaxial (-), a=1.831, b=1.861, g=1.88, bire=0.0490, 2V(Calc)=74, 2V(Meas)=75.  Dispersion strong, r < v.	Atacamite 
Biaxial (+/-), a=1.82-1.842, b=1.83-1.85, g=1.875-1.925, bire=0.0550-0.0830, 2V(Calc)=38-52, 2V(Meas)=0-90.  Dispersion relatively strong.	Dufrenite 
Biaxial (?), a=1.833	Rusakovite 
Biaxial (+), a=1.835, g=1.91,  bire=0.0750	Demesmaekerite 
Biaxial (?), a=1.83-1.84, b=1.83-1.9, g=1.88-1.9, bire=0.0500-0.0600	Utahite !
Biaxial (+), a=1.836, b=1.838, 	Gillardite !
Biaxial (+/-), a=1.784-1.888, b=1.795-1.895, g=1.814-1.915, bire=0.0270-0.0300, 2V(Calc)=62-76, 2V(Meas)=75-62.  Dispersion r > v strong.	Scorodite 
Biaxial (?), b=1.838	Melkovite 
Biaxial (?), a=1.84, g=1.87,  bire=0.0300	Deerite 
Biaxial (+), a=1.83-1.85, b=1.83-1.9, g=1.97-2.03, bire=0.1400-0.1800, 2V(Calc)=0-68, 2V(Meas)=Small.  Dispersion r >> v extreme.	Ludwigite 
Biaxial (+), a=1.84, b=1.85, g=1.85, bire=0.0100, 2V(Calc)=0, 2V(Meas)=70.  Dispersion relatively strong.	Metarossite 
Biaxial (+), a=1.84, b=1.855, g=1.92, bire=0.0800, 2V(Calc)=54, 2V(Meas)=50-52.8.	Mozartite 
Biaxial (?), b=1.84	Zincrosasite 
Biaxial (+), b=1.841	Peretaite 
Biaxial (+), a=1.843, b=1.848, g=1.945, bire=0.1020, 2V(Calc)=28, 2V(Meas)=60-70.	Hentschelite 
Biaxial (-), a=1.845, b=1.965-1.968, g=1.975, bire=0.1300, 2V(Calc)=24-30, 2V(Meas)=20.  Dispersion dispersion not observed.	Ilinskite !
Biaxial (?), b=1.84-1.85	Itoite 
Biaxial (+), a=1.845, b=1.852, g=1.878, bire=0.0330, 2V(Calc)=56, 2V(Meas)=26.  Dispersion strong, r < v.	Tornebohmite-(Ce) 
Biaxial (?), a=1.85	Bariandite 
Biaxial (-), a=1.85, b=1.95, g=1.96, bire=0.1100, 2V(Calc)=32, 2V(Meas)=small.  Dispersion none.	Chapmanite 
Biaxial (+), a=1.85, b=1.87, g=1.89, bire=0.0400	Dumontite 
Biaxial (+), a=1.85, b=1.85, g=1.88, bire=0.0300, 2V(Calc)=0, 2V(Meas)=27.  Dispersion r > v strong.	Parwelite 
Biaxial (+), a=1.85, b=1.912, g=1.92, bire=0.0700, 2V(Calc)=38, 2V(Meas)=38.  Dispersion relatively strong.	Purpurite 
Biaxial (+), a=1.85, b=1.87, g=1.9, bire=0.0500, 2V(Calc)=80, 2V(Meas)=85.  Dispersion r > v distinct.	Rappoldite !
Biaxial (+), a=1.85, b=1.91, g=2.2, bire=0.3500, 2V(Calc)=56, 2V(Meas)=55.	Spiroffite 
Biaxial (+), a=1.85, b=1.87, g=1.92, bire=0.0700, 2V(Calc)=68, 2V(Meas)=70.	Thometzekite 
Biaxial (?), a=1.852, g=1.867,  bire=0.0150, 2V(Meas)=40.	Luddenite 
Biaxial (+), a=1.855, g=1.88,  bire=0.0250, 2V(Meas)=0.	Anandite 
Biaxial (-), a=1.85-1.865, b=1.885-1.92, g=1.89-1.97, bire=0.0400-0.1050, 2V(Calc)=40-84, 2V(Meas)=50-55.  Dispersion r > v strong.	Fourmarierite 
Biaxial (-), a=1.86, b=1.88, g=1.893, bire=0.0330	Frondelite 
Biaxial (+), a=1.86, b=1.89, g=1.91, bire=0.0500	Heterosite 
Biaxial (-), a=1.86, b=1.917, g=1.93, bire=0.0700	Pattersonite !
Biaxial (+), a=1.864, b=1.865, g=1.873, bire=0.0090, 2V(Calc)=40, 2V(Meas)=30.	Pseudograndreefite 
Biaxial (-), a=1.864, b=1.895, g=1.905, bire=0.0410, 2V(Calc)=58, 2V(Meas)=52.  Dispersion r > v.	Yeatmanite 
Biaxial (-), a=1.815-1.915, b=1.96-2.115, g=1.96-2.115, bire=0.1450-0.2000, 2V(Calc)=0, 2V(Meas)=small.	Tlapallite 
Biaxial (+), a=1.868, b=1.892, g=1.928, bire=0.0600, 2V(Calc)=80, 2V(Meas)=80.	Mammothite 
Biaxial (-), a=1.87, b=1.92, g=1.94, bire=0.0700	Chloromenite !
Biaxial (-), a=1.87, b=1.92, g=2.01, bire=0.1400, 2V(Calc)=78, 2V(Meas)=58.  Dispersion strong, r > v.	Claudetite 
Biaxial (?), b=1.87, 2V(Meas)=33.	Drugmanite 
Biaxial (-), a=1.87, b=2.0085, g=2.01, bire=0.1400, 2V(Calc)=10, 2V(Meas)=10.  Dispersion relatively strong.	Leadhillite 
Biaxial (+), a=1.87, b=1.88, g=1.98, bire=0.1100, 2V(Calc)=38, 2V(Meas)=27.  Dispersion r < v very strong.	Leiteite 
Biaxial (-), a=1.87, b=2, g=2.01, bire=0.1400, 2V(Calc)=28, 2V(Meas)=35.  Dispersion r > v.	Macphersonite 
Biaxial (-), a=1.87, g=1.89,  bire=0.0200, 2V(Meas)=11-26.	Parsonsite 
Biaxial (?), a=1.87, g=1.98,  bire=0.1100	Vergasovaite !
Biaxial (-), a=1.87, b=1.897, g=1.9, bire=0.0300, 2V(Calc)=36, 2V(Meas)=35.  Dispersion strong, r < v.	Yazganite !
Biaxial (-), a=1.871, b=1.909, g=1.927, bire=0.0560, 2V(Calc)=66, 2V(Meas)=67.  Dispersion very strong, r > v.	Chenite 
Biaxial (-), a=1.871, b=1.975, g=2.005, bire=0.1340, 2V(Calc)=54, 2V(Meas)=52.	Walpurgite 
Biaxial (+), a=1.872, b=1.873, g=1.897, bire=0.0250, 2V(Calc)=24, 2V(Meas)=23.	Grandreefite 
Biaxial (+), a=1.875, b=1.88, g=1.897, bire=0.0220	Rockbridgeite 
Biaxial (?), b=1.877	Manganiandrosite-(La) !
Biaxial (+), a=1.878, b=1.883, g=1.895, bire=0.0170, 2V(Calc)=68, 2V(Meas)=75.4.  Dispersion relatively strong.	Anglesite 
Biaxial (-), a=1.873-1.886, b=1.914-1.93, g=1.914-1.939, bire=0.0410-0.0530, 2V(Calc)=0-46, 2V(Meas)=0-7.	Fersmanite 
Biaxial (+), a=1.88, b=1.928, g=2.029, bire=0.1490, 2V(Calc)=74, 2V(Meas)=72.  Dispersion r > v.	Cesbronite 
Biaxial (+), a=1.88, b=1.928, g=2.029, bire=0.1490, 2V(Calc)=74, 2V(Meas)=72.  Dispersion r > v.	Cesbronite-x 
Biaxial (?), a=1.88, g=1.95,  bire=0.0700	Magnesiohulsite 
Biaxial (-), a=1.88, g=1.95,  bire=0.0700	Rauvite 
Biaxial (+), a=1.882, g=1.915,  bire=0.0330, 2V(Meas)=80.	Hallimondite 
Biaxial (-), a=1.885, b=1.91, g=1.913, bire=0.0280, 2V(Calc)=36, 2V(Meas)=~35.  Dispersion r > v.	Bartelkeite 
Biaxial (+), a=1.885, b=1.92, g=1.956, bire=0.0710, 2V(Calc)=88, 2V(Meas)=90.  Dispersion r < v strong.	Tsumebite 
Biaxial (+), a=1.886, b=1.892, g=1.903, bire=0.0170, 2V(Calc)=74, 2V(Meas)=74.  Dispersion r > v strong.	Szenicsite 
Biaxial (+), a=1.89, b=1.9, g=1.99, bire=0.1000, 2V(Calc)=40, 2V(Meas)=50.	Bellingerite 
Biaxial (+/-), a=1.89, b=1.95, g=2.02, bire=0.1300	Cerotungstite-(Ce) 
Biaxial (+), a=1.89, b=1.91, g=1.95, bire=0.0600, 2V(Calc)=72, 2V(Meas)=43.	Kasolite 
Biaxial (+), a=1.89, b=1.91, g=1.977, bire=0.0870, 2V(Calc)=60, 2V(Meas)=58.2.  Dispersion strong.	Schultenite 
Biaxial (-), a=1.89, g=1.91,  bire=0.0200, 2V(Meas)=48.	Wyartite 
Biaxial (?), a=1.89, b=1.95, g=2.02, bire=0.1300	Yttrotungstite-(Ce) !
Biaxial (-), a=1.89, b=1.98, g=2.02, bire=0.1300, 2V(Calc)=64, 2V(Meas)=68.	Yttrotungstite-(Y) 
Biaxial (?), b=1.891	Munakataite !
Biaxial (+), a=1.84-1.95, b=1.87-2.034, g=1.943-2.11, bire=0.1030-0.1600, 2V(Calc)=68-82, 2V(Meas)=20-56.  Dispersion r > v extreme.	Titanite 
Biaxial (+/-), a=1.896, b=1.903, g=1.903, bire=0.0070, 2V(Calc)=0, 2V(Meas)=20.  Dispersion strong, r < v.	Britvinite !
Biaxial (-), a=1.897, b=1.911, g=1.932, bire=0.0350, 2V(Calc)=80, 2V(Meas)=81.	Metacalciouranoite 
Biaxial (-), a=1.897, b=1.94, g=1.942, bire=0.0450, 2V(Calc)=22, 2V(Meas)=24.  Dispersion r < v marked.	Schieffelinite 
Biaxial (+), a=1.898, g=1.915,  bire=0.0170, 2V(Meas)=25.  Dispersion r << v extreme.	Hugelite 
Biaxial (+), a=1.898, b=1.9, g=1.922, bire=0.0240	Huttonite 
Biaxial (+), a=1.899, b=1.901, g=1.903, bire=0.0040, 2V(Calc)=88, 2V(Meas)=90.	Queitite 
Biaxial (+), a=1.9, b=1.93, g=1.96, bire=0.0600, 2V(Calc)=88, 2V(Meas)=90.	Deloryite 
Biaxial (?), b=1.9	Doloresite 
Biaxial (?), b=1.9	Freedite 
Biaxial (?), b=1.9	Guyanaite 
Biaxial (+), b=1.9, g=1.95, , 2V(Meas)=54.	Lammerite 
Biaxial (?), a=1.9	Lithiotantite 
Biaxial (-), a=1.9, b=1.93, g=2, bire=0.1000, 2V(Calc)=70, 2V(Meas)=70.  Dispersion dispersion not observed.	Phosphogartrellite !
Biaxial (?), a=1.9, g=2,  bire=0.1000	Phosphowalpurgite !
Biaxial (-), a=1.9, b=2, g=2, bire=0.1000, 2V(Calc)=0, 2V(Meas)=large.	Richetite 
Biaxial (?), b=1.9, 2V(Meas)=90.	Tsumcorite 
Biaxial (?), a=1.905, b=2.02, 	Navajoite 
Biaxial (-), a=1.908, b=2.05, g=2.65, bire=0.7420, 2V(Calc)=64, 2V(Meas)=32.  Dispersion r < v.	Pinakiolite 
Biaxial (-), a=1.91, b=2.03, g=2.11, bire=0.2000	Bamfordite !
Biaxial (-), a=1.91, b=1.97, g=2, bire=0.0900	Blatterite 
Biaxial (-), a=1.91, b=2, g=2.05, bire=0.1400, 2V(Calc)=70, 2V(Meas)=70.	Orthowalpurgite 
Biaxial (-), a=1.91, b=1.94, g=1.97, bire=0.0600	Zincgartrellite !
Biaxial (-), a=1.911-1.916, g=1.92-1.932,  bire=0.0090-0.0160, 2V(Meas)=81.	Bauranoite 
Biaxial (+), a=1.92, b=1.96, g=2.04, bire=0.1200	Chenevixite 
Biaxial (+), a=1.92, b=1.94, g=1.98, bire=0.0600	Cobalttsumcorite !
Biaxial (+), a=1.92, b=1.96, g=2.2, bire=0.2800, 2V(Calc)=50, 2V(Meas)=48.5.	Graemite 
Biaxial (?), a=1.92	Jensenite 
Biaxial (-), a=1.92, b=1.95, g=1.95, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0-5.  Dispersion r > v strong.	Katoptrite 
Biaxial (-), a=1.92, b=1.95, g=1.96, bire=0.0400, 2V(Calc)=58, 2V(Meas)=80.  Dispersion r > v.	Larsenite 
Biaxial (-), a=1.92, b=2.01, g=2.02, bire=0.1000, 2V(Calc)=34, 2V(Meas)=38-40.  Dispersion none.	Lorenzenite 
Biaxial (-), a=1.92, b=1.95, g=1.96, bire=0.0400	Manganostibite 
Biaxial (+), a=1.92, b=1.922, g=1.943, bire=0.0230, 2V(Calc)=36, 2V(Meas)=20.	Otjisumeite 
Biaxial (+), a=1.92, b=1.94, g=1.95, bire=0.0300	Philolithite !
Biaxial (-), a=1.922, b=1.933, g=1.938, bire=0.0160, 2V(Calc)=66, 2V(Meas)=32.	Plumbotsumite 
Biaxial (-), a=1.9-1.95, b=2.01, g=2.02-2.06, bire=0.1100-0.1200, 2V(Calc)=32-82, 2V(Meas)=60.	Perrierite-(Ce) 
Biaxial (-), a=1.925, b=1.96, g=1.988, bire=0.0630	Ronneburgite !
Biaxial (-), a=1.928, b=2.007, g=2.036, bire=0.1080	Lanarkite 
Biaxial (?), b=1.92-1.94	Bernalite 
Biaxial (?), a=1.93, b=1.97, g=2.01, bire=0.0800	Bismutoferrite 
Biaxial (-), a=1.93, b=2.002, g=2.02, bire=0.0900, 2V(Calc)=50, 2V(Meas)=71.  Dispersion r > v.	Lindgrenite 
Biaxial (+), a=1.93, b=1.95, g=1.98, bire=0.0500	Schneebergite !
Biaxial (-), a=1.935, b=1.966, g=1.983, bire=0.0480, 2V(Calc)=72, 2V(Meas)=80.	Olsacherite 
Biaxial (-), a=1.937, g=1.97,  bire=0.0330	Maoniupingite-(Ce) !
Biaxial (+), a=1.94, b=1.98, g=2.06, bire=0.1200, 2V(Calc)=74, 2V(Meas)=78.	Gartrellite 
Biaxial (+), a=1.94, b=2.2, g=2.51, bire=0.5700, 2V(Calc)=84, 2V(Meas)=83.  Dispersion relatively weak.	Lepidocrocite 
Biaxial (-), a=1.94, b=2, g=2.04, bire=0.1000, 2V(Calc)=76, 2V(Meas)=80.	Mawbyite 
Biaxial (+), a=1.94, b=1.95, g=1.97, bire=0.0300	Nickelschneebergite !
Biaxial (-), b=1.94, g=1.95, 	Sayrite 
Biaxial (-), a=1.94, b=2.04-2.05, g=2.05-2.06, bire=0.1100-0.1200, 2V(Calc)=32, 2V(Meas)=small.  Dispersion r > v slight.	Tooeleite 
Biaxial (?), b=1.94	Wilhelmkleinite !
Biaxial (-), a=1.942, b=2.01, g=2.024, bire=0.0820, 2V(Calc)=46, 2V(Meas)=50.	Wherryite 
Biaxial (-), a=1.947, b=1.961, g=1.968, bire=0.0210, 2V(Calc)=70, 2V(Meas)=65.	Alamosite 
Biaxial (+), a=1.95, b=1.97, g=1.99, bire=0.0400	Bayldonite 
Biaxial (-), a=1.95, b=2.08, g=2.11, bire=0.1600, 2V(Calc)=48, 2V(Meas)=38.	Cafetite 
Biaxial (-), a=1.95, b=2.13, g=2.21, bire=0.2600, 2V(Calc)=62, 2V(Meas)=58.  Dispersion very strong, r > v.	Kassite 
Biaxial (-), b=1.95, 2V(Meas)=70.	Klebelsbergite 
Biaxial (?), b=1.95, g=1.97, , 2V(Meas)=32.	Rameauite 
Biaxial (+), a=1.95, g=2.105,  bire=0.1550, 2V(Meas)=17-40.	Vanadomalayaite 
Biaxial (+), a=1.952, b=1.96, g=1.977, bire=0.0250, 2V(Calc)=70, 2V(Meas)=35-57.	Hashemite 
Biaxial (?), a=1.952, g=2.002,  bire=0.0500	Kuranakhite 
Biaxial (+), a=1.9579, b=2.0377, g=2.2452, bire=0.2873, 2V(Calc)=70, 2V(Meas)=68.967.  Dispersion relatively weak.	Sulfur 
Biaxial (+), a=1.959, b=1.981, g=2.06, bire=0.1010, 2V(Calc)=58, 2V(Meas)=56.  Dispersion strong, r < v.	Uranosphaerite 
Biaxial (-), a=1.96, b=2.01, g=2.04, bire=0.0800, 2V(Calc)=72, 2V(Meas)=75.	Brownmillerite 
Biaxial (-), a=1.96, b=1.995, g=2.02, bire=0.0600, 2V(Calc)=78, 2V(Meas)=75.	Jamesite 
Biaxial (-), a=1.96, b=2.1, g=2.1, bire=0.1400	Karibibite 
Biaxial (?), a=1.96, g=1.98,  bire=0.0200, 2V(Meas)=50.	Kerstenite ?
Biaxial (+), a=1.96, b=2.055, g=2.11, bire=0.1500	Ludlockite 
Biaxial (+), a=1.96, b=2.055, g=2.11, bire=0.1500	Ludlockite-(Pb) *
Biaxial (?), b=1.96	Orlandiite !
Biaxial (-), a=1.962, b=2.09, g=2.1-2.12, bire=0.1380-0.1580, 2V(Calc)=28-48, 2V(Meas)=23.  Dispersion relatively strong.	Emmonsite 
Biaxial (+), a=1.963, b=1.963, g=1.966, bire=0.0030, 2V(Calc)=0, 2V(Meas)=small.  Dispersion strong, r < v.	Hyalotekite 
Biaxial (-), a=1.97, b=1.992, g=2.011, bire=0.0410, 2V(Calc)=84, 2V(Meas)=88.	Arsentsumebite 
Biaxial (?), a=1.97, b=2.13, g=2.13, bire=0.1600	Beyerite 
Biaxial (-), a=1.967-1.973, b=2.02, g=2.05, bire=0.0770-0.0830	Chevkinite-(Ce) 
Biaxial (?), b=1.97	Steropesite !
Biaxial (-), a=1.971, g=1.981,  bire=0.0100, 2V(Meas)=12-20.	Kuksite 
Biaxial (-), a=1.978, g=2.01,  bire=0.0320	Dingdaohengite-(Ce) !
Biaxial (+), a=1.98, b=2.01, g=2.08, bire=0.1000	Allochalcoselite !
Biaxial (-), a=1.98, b=2.04, g=2.1, bire=0.1200	Fiedlerite 
Biaxial (-), a=1.982, b=2.095, g=2.19, bire=0.2080, 2V(Calc)=80, 2V(Meas)=80.	Carlfriesite 
Biaxial (-), a=1.986, b=1.9965, g=1.997, bire=0.0110, 2V(Calc)=24, 2V(Meas)=20.  Dispersion r > v.	Cheremnykhite 
Biaxial (-), a=1.99, b=2.03, g=2.035, bire=0.0450, 2V(Calc)=38, 2V(Meas)=30.	Arsendescloizite 
Biaxial (-), a=1.99, b=2.03, g=2.06, bire=0.0700, 2V(Calc)=80, 2V(Meas)=large.  Dispersion appreciable, r < v.	Bushmakinite !
Biaxial (?), a=1.99, g=2,  bire=0.0100	Cervandonite-(Ce) 
Biaxial (-), a=1.99, b=1.993, g=1.994, bire=0.0040, 2V(Calc)=58, 2V(Meas)=66.	Elyite 
Biaxial (?), a=1.99, g=2.03,  bire=0.0400	Tokyoite !
Biaxial (-), a=1.997, b=2.098, g=2.108, bire=0.1110, 2V(Calc)=32, 2V(Meas)=30-50.  Dispersion relatively weak.	Clarkeite 
Biaxial (-), a=2, b=2, g=2, bire=0.0000, 2V(Calc)=0, 2V(Meas)=66.	Alumotantite 
Biaxial (-), b=2	Arsenbrackebuschite 
Biaxial (?), a=2	Aurorite 
Biaxial (?), b=2	Cavoite !
Biaxial (?), a=2, g=2.1,  bire=0.1000	Cervantite 
Biaxial (?), a=2	Chursinite 
Biaxial (?), b=2	Frankhawthorneite 
Biaxial (-), a=2, b=2.1, g=2.1, bire=0.1000, 2V(Calc)=0, 2V(Meas)=medium.	Hendersonite 
Biaxial (?), a=2	Hephaistosite !
Biaxial (?), b=2	Nealite 
Biaxial (?), b=2	Nealite-(H2O) *
Biaxial (?), a=2, b=2.145, 	Pingguite 
Biaxial (?), b=2	Poyarkovite 
Biaxial (?), b=2	Pseudocotunnite 
Biaxial (+), b=2	Radtkeite 
Biaxial (-), a=2, 2V(Meas)=large.	Straczekite 
Biaxial (-), a=2, b=2.18, g=2.35, bire=0.3500	Tellurite 
Biaxial (+), b=2	Titanowodginite 
Biaxial (-), a=2, b=2.01, g=2.02, bire=0.0200	Turanite 
Biaxial (?), a=2, g=2,  bire=0.0000	Xocolatlite !
Biaxial (+), a=2.004, b=2.01, g=2.024, bire=0.0200	Challacolloite !
Biaxial (?), b=2.01, g=2.06, , 2V(Meas)=55.	Agrinierite 
Biaxial (?), a=2.01, g=2.06,  bire=0.0500	Bokite 
Biaxial (?), a=2.01	IMA2000-026 !
Biaxial (?), a=2.01	Santafeite 
Biaxial (?), a=2.01, b=2.11, 	Stanekite !
Biaxial (+), a=2.01, b=2.05, g=2.09, bire=0.0800, 2V(Calc)=88, 2V(Meas)=83.	Tangeite 
Biaxial (-), a=2.01, b=2.04, g=2.07, bire=0.0600	Volborthite 
Biaxial (-), b=1.97-2.058	Rosickyite 
Biaxial (+), a=2.016, b=2.04, g=2.13, bire=0.1140, 2V(Calc)=58, 2V(Meas)=46-62.	Gamagarite 
Biaxial (-), a=2.018, b=2.023, g=2.025, bire=0.0070, 2V(Calc)=64, 2V(Meas)=20-25.	Sonoraite 
Biaxial (-), a=2.02, b=2.09, g=2.12, bire=0.1000	Cobaltneustadtelite !
Biaxial (-), a=2.02, b=2.08, g=2.12, bire=0.1000	Neustadtelite !
Biaxial (?), b=2.02	Pararealgar 
Biaxial (-), a=2.03, b=2.09, g=2.1, bire=0.0700, 2V(Calc)=42, 2V(Meas)=43.  Dispersion r > v.	Medenbachite !
Biaxial (?), a=2.03, b=2.03, g=2.03, bire=0.0000	Shakhovite 
Biaxial (+), a=2.035, b=2.04, g=2.085, bire=0.0500, 2V(Calc)=38, 2V(Meas)=35.  Dispersion r < v strong.	Scotlandite 
Biaxial (-), a=2.04, b=2.08, g=2.1, bire=0.0600	Duftite-alpha 
Biaxial (-), a=2.04, b=2.08, g=2.1, bire=0.0600	Duftite-beta ?
Biaxial (+), a=2.05, g=2.2,  bire=0.1500, 2V(Meas)=80.	Blixite 
Biaxial (+), a=2.05, g=2.15,  bire=0.1000	Molybdofornacite 
Biaxial (-), a=2.05, b=2.15, g=2.2, bire=0.1500	Paralaurionite 
Biaxial (?), b=2.05	Scheteligite ?
Biaxial (+), a=2.05, b=2.06, g=2.09, bire=0.0400, 2V(Calc)=62, 2V(Meas)=58-61.	Smrkovecite !
Biaxial (?), a=2.05, g=2.09,  bire=0.0400	Wolsendorfite 
Biaxial (-), a=2.053, b=2.129, g=2.133, bire=0.0800, 2V(Calc)=24, 2V(Meas)=60.	Vesignieite 
Biaxial (?), b=2.055	Ziesite 
Biaxial (-), a=2.06, b=2.15, g=2.19, bire=0.1300	Brendelite !
Biaxial (+), a=2.05-2.07, b=2.05-2.07, g=2.06-2.08, bire=0.0100, 2V(Calc)=0, 2V(Meas)=medium.  Dispersion r > v strong.	Carminite 
Biaxial (-), a=2.06, b=2.11, g=2.15, bire=0.0900, 2V(Calc)=80, 2V(Meas)=70.	Curite 
Biaxial (-), a=2.06, b=2.11, g=2.15, bire=0.0900	Georgbokiite !
Biaxial (+), a=2.06, g=2.13,  bire=0.0700, 2V(Meas)=75.	Petitjeanite 
Biaxial (+), a=2.07, b=2.08, g=2.19, bire=0.1200, 2V(Calc)=36, 2V(Meas)=20-25.	Fersmite 
Biaxial (?), a=2.07, g=2.09,  bire=0.0200	Paganoite !
Biaxial (-), a=2.07, b=2.1, g=2.12, bire=0.0500	Trigonite 
Biaxial (-), a=2.077, b=2.116, g=2.158, bire=0.0810, 2V(Calc)=90, 2V(Meas)=70.	Laurionite 
Biaxial (+), b=2.08, 2V(Meas)=80-85.	Coquandite 
Biaxial (?), a=2.08, b=2.11, 	Duhamelite ?
Biaxial (-), a=2.08, g=2.12,  bire=0.0400	Gebhardite 
Biaxial (-), a=2.09, b=2.09, , 2V(Meas)=0-15.  Dispersion r < v extreme.	Montanite 
Biaxial (?), b=2.09	Mounanaite 
Biaxial (-), a=2.09, b=2.24, g=2.26, bire=0.1700	Tungstite 
Biaxial (+), b=2.1	Calderonite !
Biaxial (?), a=2.1, g=2.58,  bire=0.4800	Edgarbaileyite 
Biaxial (?), b=2.1	Gerstleyite 
Biaxial (+), a=2.1, b=2.2, g=2.31, bire=0.2100, 2V(Calc)=88, 2V(Meas)=88.  Dispersion strong, r < v.	Kentrolite 
Biaxial (+), a=2.1, b=2.1, g=2.1, bire=0.0000	Lakargiite !
Biaxial (-), a=2.1, 2V(Meas)=moderate.	Namibite 
Biaxial (?), a=2.1	Peterbaylissite 
Biaxial (-), a=2.1, b=2.183-2.185, g=2.185, bire=0.0850, 2V(Calc)=0-16, 2V(Meas)=0-18.	Phyllotungstite 
Biaxial (?), b=2.1	Rankamaite 
Biaxial (-), a=2.1, g=2.2,  bire=0.1000, 2V(Meas)=38.	Rodalquilarite 
Biaxial (+), a=2.1, g=2.17,  bire=0.0700	Sundiusite 
Biaxial (-), a=2.1	Trimounsite-(Y) 
Biaxial (+), a=2.1, 2V(Meas)=80.  Dispersion r < v very strong.	Zimbabweite 
Biaxial (+), a=2.105, b=2.32, g=2.65, bire=0.5450, 2V(Calc)=88, 2V(Meas)=88.  Dispersion strong.	Hemihedrite 
Biaxial (-), a=2.11, b=2.18, g=2.22, bire=0.1100, 2V(Calc)=72, 2V(Meas)=80.	Balyakinite 
Biaxial (+), a=2.11, b=2.112, g=2.165, bire=0.0550, 2V(Calc)=24, 2V(Meas)=20.  Dispersion strong.	Khinite 
Biaxial (+), a=2.11, g=2.13,  bire=0.0200	Schneiderhohnite 
Biaxial (-), a=2.11, b=2.22, g=2.22, bire=0.1100	Vauquelinite 
Biaxial (+), a=2.1-2.13, b=2.19-2.21, g=2.21-2.24, bire=0.1100, 2V(Calc)=48-60, 2V(Meas)=10-30.  Dispersion r < v.	Natroniobite 
Biaxial (+), a=2.115, b=2.135, g=2.26, bire=0.1450, 2V(Calc)=46, 2V(Meas)=40.	Rajite 
Biaxial (+), a=2.12, b=2.17, g=2.31, bire=0.1900	Melanotekite 
Biaxial (-), a=2.12, g=2.14,  bire=0.0200, 2V(Meas)=80.	Molybdomenite 
Biaxial (-), a=2.12, b=2.32, g=2.32, bire=0.2000, 2V(Calc)=0, 2V(Meas)=4.	Seeligerite 
Biaxial (?), a=2.12, g=2.16,  bire=0.0400	Symesite !
Biaxial (?), a=2.12, 2V(Meas)=40.	Tranquillityite 
Biaxial (+/-), a=2.06-2.19, b=2.06-2.19, g=2.06-2.19, bire=0.0000, 2V(Calc)=0, 2V(Meas)=0.	Fergusonite-beta-(Y) 
Biaxial (+), a=2.13, b=2.2, g=2.4, bire=0.2700	Angelellite 
Biaxial (-), a=2.13, b=2.19, g=2.2, bire=0.0700, 2V(Calc)=42, 2V(Meas)=30.  Dispersion strong, r > v.	Baddeleyite 
Biaxial (?), a=2.13, b=2.21, g=2.35, bire=0.2200	Jeppeite 
Biaxial (?), a=2.13, b=2.16, g=2.195, bire=0.0650, 2V(Calc)=88, 2V(Meas)=90.	Preisingerite 
Biaxial (?), a=2.12-2.15, b=2.12-2.15, g=2.28, bire=0.1300-0.1600	Bismutite 
Biaxial (+), a=2.14, b=2.15, g=2.18, bire=0.0400, 2V(Calc)=62, 2V(Meas)=44.	Atelestite 
Biaxial (?), a=2.14, g=2.15,  bire=0.0100	Eztlite 
Biaxial (+), a=2.14, g=2.24,  bire=0.1000, 2V(Meas)=large.	Fornacite 
Biaxial (+), a=2.14, b=2.15, g=2.18, bire=0.0400, 2V(Calc)=62, 2V(Meas)=50.	Rooseveltite 
Biaxial (+), a=2.14, g=2.315,  bire=0.1750, 2V(Meas)=large.  Dispersion extreme.	Vigezzite 
Biaxial (-), b=2.14-2.15, 2V(Meas)=8.	Clinomimetite 
Biaxial (?), b=2.15	Biehlite !
Biaxial (+), b=2.15	Yttrocolumbite-(Y) 
Biaxial (-), a=2.16, b=2.24, g=2.25, bire=0.0900, 2V(Calc)=36, 2V(Meas)=70.	Chloroxiphite 
Biaxial (+), a=2.14-2.19, b=2.15-2.25, g=2.22-2.34, bire=0.0800-0.1500	Tantalite-(Mn) 
Biaxial (+), a=2.17, b=2.17, g=2.18, bire=0.0100	Georgiadesite 
Biaxial (-), a=2.18, b=2.35, g=2.35, bire=0.1700	Valentinite 
Biaxial (-), a=2.185, b=2.265, g=2.35, bire=0.1650, 2V(Calc)=88, 2V(Meas)=85-90.  Dispersion relatively strong.	Descloizite 
Biaxial (?), a=2.185, b=2.219, g=2.266, bire=0.0810, 2V(Calc)=84, 2V(Meas)=89.	Heyite 
Biaxial (+), a=2.17-2.2, b=2.22, g=2.3-2.32, bire=0.1200-0.1300, 2V(Calc)=50-80, 2V(Meas)=73.	Hubnerite 
Biaxial (-), a=2.186, b=2.222, g=2.224, bire=0.0380, 2V(Calc)=26, 2V(Meas)=0-20.  Dispersion relatively strong.	Fervanite 
Biaxial (?), a=2.19, g=2.28,  bire=0.0900	Mereheadite !
Biaxial (+), a=2.19, b=2.23, g=2.35, bire=0.1600, 2V(Calc)=64, 2V(Meas)=50.	Plumbotellurite 
Biaxial (+), a=2.199, b=2.217, g=2.26, bire=0.0610, 2V(Calc)=68, 2V(Meas)=67.2.	Cotunnite 
Biaxial (?), b=2.2	Bannermanite 
Biaxial (-), a=2.2, g=2.3,  bire=0.1000	Capgaronnite 
Biaxial (-), a=2.2, b=2.36, g=2.36, bire=0.1600, 2V(Calc)=0, 2V(Meas)=0-10.	Embreyite 
Biaxial (+), b=2.2, 2V(Meas)=0.	Russellite 
Biaxial (+), a=2.2, g=2.3-2.42,  bire=0.1000-0.2200, 2V(Meas)=~90.	Schumacherite 
Biaxial (-), b=2.18-2.23, g=2.23-2.26, 	Onoratoite 
Biaxial (?), a=2.21, g=2.39,  bire=0.1800	Krettnichite !
Biaxial (-), a=2.21, b=2.31, g=2.33, bire=0.1200, 2V(Calc)=46, 2V(Meas)=73.	Mottramite 
Biaxial (-), a=2.22, b=2.255, g=2.26, bire=0.0400, 2V(Calc)=40, 2V(Meas)=42.  Dispersion Calculated index values.	Schlegelite !
Biaxial (+/-), a=2.24, b=2.27, g=2.31, bire=0.0700, 2V(Calc)=84, 2V(Meas)=90.	Mendipite 
Biaxial (?), a=2.24, g=2.26,  bire=0.0200	Oboyerite 
Biaxial (-), a=2.24, b=2.25, g=2.27, bire=0.0300	Srebrodolskite 
Biaxial (?), a=2.25, g=2.4-2.5,  bire=0.1500-0.2500	Iranite 
Biaxial (+), b=2.25, g=2.25, , 2V(Meas)=70-80.  Dispersion r > v extreme.	Kenhsuite !
Biaxial (+), a=2.25, b=2.25, g=2.53, bire=0.2800	Manganite 
Biaxial (-), a=2.25, b=2.35, g=2.36, bire=0.1100, 2V(Calc)=32, 2V(Meas)=small.  Dispersion very weak.	Schwartzembergite 
Biaxial (+), a=2.255, b=2.305, g=2.414, bire=0.1590, 2V(Calc)=72, 2V(Meas)=68.	Ferberite 
Biaxial (+), a=2.26, b=2.27, g=2.3, bire=0.0400	Hechtsbergite !
Biaxial (+), a=2.26, b=2.3-2.4, g=2.43, bire=0.1700	Tantalite-(Fe) 
Biaxial (+), b=2.25-2.28	Sanmartinite 
Biaxial (-), a=2.26-2.275, b=2.393-2.409, g=2.398-2.515, bire=0.1380-0.2400, 2V(Calc)=20-78, 2V(Meas)=0-27.  Dispersion r > v extreme.	Goethite 
Biaxial (+), a=2.27, b=2.27, g=2.3, bire=0.0300, 2V(Calc)=0, 2V(Meas)=0.	Raspite 
Biaxial (+), a=2.28, b=2.36-2.38, g=2.48-2.49, bire=0.2000-0.2100, 2V(Calc)=82-88, 2V(Meas)=~90.  Dispersion r > v strong.	Brackebuschite 
Biaxial (-), a=2.28, b=2.31, g=2.34, bire=0.0600, 2V(Calc)=88, 2V(Meas)=85.	Macquartite 
Biaxial (+), a=2.285, b=2.4, g=2.58, bire=0.2950, 2V(Calc)=84, 2V(Meas)=82.  Dispersion strong, r < v.	Tungstibite 
Biaxial (?), a=2.29, b=2.31, g=2.33, bire=0.0400, 2V(Calc)=88, 2V(Meas)=86.	Fairbankite 
Biaxial (-), b=2.29, g=2.35, 	Leningradite 
Biaxial (+), b=2.294	Foordite 
Biaxial (?), b=2.3, 2V(Meas)=45.	Lueshite 
Biaxial (+), a=2.3, b=2.35, g=2.4, bire=0.1000, 2V(Calc)=88, 2V(Meas)=85.  Dispersion r > v strong.	Nadorite 
Biaxial (+), a=2.3, b=2.34, g=2.38, bire=0.0800, 2V(Calc)=88, 2V(Meas)=90.  Dispersion r > v.	Perovskite 
Biaxial (+), a=2.3, b=2.4, , 2V(Meas)=~70.  Dispersion r > v very strong.	Perroudite 
Biaxial (+), a=2.3	Quenselite 
Biaxial (+), a=2.31, b=2.35, g=2.4, bire=0.0900, 2V(Calc)=86, 2V(Meas)=70-75.	Ashanite ?
Biaxial (+), a=2.31, b=2.37, g=2.66, bire=0.3500, 2V(Calc)=54, 2V(Meas)=57.  Dispersion none.	Crocoite 
Biaxial (-), a=2.32, b=2.36, g=2.37, bire=0.0500, 2V(Calc)=52, 2V(Meas)=29.  Dispersion r > v.	Pyrobelonite 
Biaxial (?), b=2.321	Lucasite-(Ce) 
Biaxial (+), b=2.29-2.4	Columbite-(Fe) 
Biaxial (-), a=2.33-2.36, g=2.39-2.44,  bire=0.0600-0.0800	Columbite-(Mg) 
Biaxial (+), b=2.35	Perite 
Biaxial (+), a=2.35, b=2.36, g=2.46, bire=0.1100, 2V(Calc)=38, 2V(Meas)=35-40.	Smirnite 
Biaxial (-), a=2.35, b=2.64, g=2.66, bire=0.3100, 2V(Calc)=26, 2V(Meas)=20.  Dispersion relatively strong.	Terlinguaite 
Biaxial (+), a=2.35-2.38, b=2.36-2.39, g=2.38-2.42, bire=0.0300-0.0400, 2V(Calc)=62-72, 2V(Meas)=50.	Pseudobrookite 
Biaxial (+), a=2.37, b=2.5, g=2.65, bire=0.2800	Montroydite 
Biaxial (+), a=2.3742, b=2.4039, g=2.4568, bire=0.0826, 2V(Calc)=76, 2V(Meas)=75.083.  Dispersion relatively strong.	Stibiotantalite 
Biaxial (+), a=2.38, b=2.42, g=2.47, bire=0.0900, 2V(Calc)=86, 2V(Meas)=85.	Bismutocolumbite 
Biaxial (+), a=2.38, b=2.44, g=2.65, bire=0.2700, 2V(Calc)=62, 2V(Meas)=58.  Dispersion r > v strong.	Phoenicochroite 
Biaxial (-), a=2.38, 2V(Meas)=16.  Dispersion high birefringence.	Srilankite 
Biaxial (+), a=2.38, g=2.68,  bire=0.3000	Uzonite 
Biaxial (+), a=2.388, b=2.403, g=2.428, bire=0.0400, 2V(Calc)=78, 2V(Meas)=80.  Dispersion r < v.	Bismutotantalite 
Biaxial (+), a=2.39, g=2.52,  bire=0.1300	Alacranite 
Biaxial (+), a=2.39, b=2.42, g=2.52, bire=0.1300, 2V(Calc)=60, 2V(Meas)=25-35.	Thoreaulite 
Biaxial (+), b=2.37-2.42	Freudenbergite 
Biaxial (+), a=2.3977, b=2.419, g=2.4588, bire=0.0611, 2V(Calc)=74, 2V(Meas)=73.417.	Stibiocolumbite 
Biaxial (-), b=2.2-2.6, 2V(Meas)=65-75.	Chervetite 
Biaxial (-), a=2.4, b=2.81, g=3.02, bire=0.6200, 2V(Calc)=62, 2V(Meas)=76.  Dispersion r > v strong.	Orpiment 
Biaxial (-), a=2.41, b=2.5, g=2.51, bire=0.1000, 2V(Calc)=34, 2V(Meas)=19.  Dispersion marked to extreme, r < v.	Pucherite 
Biaxial (?), b=2.42	Shcherbinaite 
Biaxial (-), a=2.44, b=2.47, g=2.48, bire=0.0400, 2V(Calc)=58, 2V(Meas)=70.  Dispersion r > v strong.	Girdite 
Biaxial (?), b=2-2.9	Carmichaelite !
Biaxial (-), a=2.45, b=2.5, g=2.65, bire=0.2000, 2V(Calc)=64, 2V(Meas)=65.  Dispersion r < v distinct.	Chekhovichite 
Biaxial (+), a=2.45, b=2.45, g=2.51, bire=0.0600, 2V(Calc)=0, 2V(Meas)=~0.	Derbylite 
Biaxial (?), a=2.44-2.52, g=2.7-2.86,  bire=0.2600-0.3400	Wattersite 
Biaxial (+), a=2.49, b=2.495, g=2.505, bire=0.0150, 2V(Calc)=72, 2V(Meas)=70-70.5.  Dispersion r > v moderate.	Pinalite 
Biaxial (+), a=2.51, b=2.61, g=2.71, bire=0.2000, 2V(Calc)=86, 2V(Meas)=90.  Dispersion none.	Massicot 
Biaxial (-), a=2.52, b=2.61, g=2.67, bire=0.1500, 2V(Calc)=76, 2V(Meas)=large.  Dispersion r < v strong.	Koechlinite 
Biaxial (-), a=2.538, b=2.684, g=2.704, bire=0.1660, 2V(Calc)=38, 2V(Meas)=40.  Dispersion r > v very strong.	Realgar 
Biaxial (+), a=2.583-2.584, b=2.584-2.588, g=2.705-2.741, bire=0.1220-0.1570, 2V(Calc)=12-20, 2V(Meas)=10.  Dispersion relatively strong.	Brookite 
Biaxial (?), a=2.7	Pearceite 
Biaxial (+), a=2.7, b=2.7, g=2.7, bire=0.0000	Pyrostilpnite 
Biaxial (?), a=2.7	Schreyerite 
Biaxial (?), b=2.71	Dufrenoysite 
Biaxial (-), b=2.72, 2V(Meas)=22.  Dispersion very strong.	Arsenpolybasite 
Biaxial (+), a=2.72, 2V(Meas)=<46.  Dispersion r > v strong.	Getchellite 
Biaxial (+), a=2.72, b=2.74, g=2.74, bire=0.0200	Kermesite 
Biaxial (+), a=2.72, 2V(Meas)=70-90.  Dispersion r >> v strong.	Lorandite 
Biaxial (+), a=2.72, g=2.78,  bire=0.0600	Miargyrite 
Biaxial (+), b=2.72	Vrbaite 
Biaxial (-), b=2.72-2.8	Livingstonite 
Biaxial (?), b=2.78-2.81	Fangite 
Biaxial (?), b=2.81	Gillulyite 
Biaxial (-), b=3, 2V(Meas)=34.  Dispersion r < v.	Xanthoconite 
Biaxial (-), a=3.078, b=3.176, g=3.188, bire=0.1100, 2V(Calc)=36, 2V(Meas)=37.4.  Dispersion marked to extreme, r < v.	Hutchinsonite 
Biaxial (-), b=3.27, 2V(Meas)=~65.	Smithite 
Biaxial (-), a=3.3	Sahlinite 

(* - Mineral name not approved by the IMA)
(! - New Dana classification number has been added or changed)
(? - IMA Discredited Mineral Species Name)

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