Luster
Waxy, Silky, Resinous, Greasy
Vitreous
Pleochroism
-
X = colorless to green; Y = colorless
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
TranslucentHerve Nicolas Lazzarelli
-
Refractive Index
1.530-1.5751.660-1.685
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
Orthorhombic
Birefringence
-99990.012-0.017
0
0.296
👆🏻
Clarity
TranslucentHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda