Luster
Vitreous
Vitreous, Resinous
Pleochroism
-
StrongArthur Thomas
Dispersion
0.010.17
0.005
1
👆🏻
Transparency
Opaque
Transparent, Translucent
Refractive Index
1.5401.525-1.686
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal
Orthorhombic
Birefringence
-99990.155
0
0.296
👆🏻
Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent