Luster
Greasy, Vitreous
Subadamantine, Pearly
Pleochroism
None
-
Dispersion
0.030.03
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.7601.622
1
3.25
👆🏻
Optic Character
-
-
Crystal System
cubic
monoclinic
Birefringence
0.010-0.0140.065
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
-