Luster
Vitreous, Waxy
Vitreous, Resinous
Pleochroism
-
Weak to distinct
Dispersion
0.010.01
0.005
1
👆🏻
Transparency
Translucent, Opaque, Translucent to nearly opaque
Transparent, Transparent to opaque
Refractive Index
1.530-1.5431.560-1.604
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal
Hexagonal
Birefringence
0.0040.0040-0.0070
0
0.296
👆🏻
Clarity
Translucent
Transparent