Luster
Vitreous, Adamantine
-
Pleochroism
Strong: purplish-red
-
Dispersion
0.020.01
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to opaque
-
Refractive Index
1.762-1.778-9999
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal
-
Birefringence
0.008-9999
0
0.296
👆🏻
Clarity
Transparent
-