Luster
Vitreous, Pearly
Vitreous, Adamantine
Pleochroism
Pale green to pale orange
Strong: purplish-red
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
Transparent, Translucent
Transparent, Translucent, Transparent to opaque
Refractive Index
1.650-1.6801.762-1.778
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Trigonal
Birefringence
0.009-0.0110.008
0
0.296
👆🏻
Clarity
Transparent
Transparent