Luster
Waxy, Silky, Resinous, Greasy
Vitreous, Adamantine
Pleochroism
-
Strong: purplish-red
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
TranslucentHerve Nicolas Lazzarelli
Transparent, Translucent, Transparent to opaque
Refractive Index
1.530-1.5751.762-1.778
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
Trigonal
Birefringence
-99990.008
0
0.296
👆🏻
Clarity
TranslucentHerve Nicolas Lazzarelli
Transparent