Luster
Vitreous, Greasy, Silky
Greasy, Vitreous
Pleochroism
-
None
Dispersion
0.010.03
0.005
1
👆🏻
Transparency
Translucent
-
Refractive Index
1.560-1.5711.760
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
cubic
Birefringence
0.008-0.0140.010-0.014
0
0.296
👆🏻
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda