Luster
-
Vitreous
Pleochroism
-
Very strong: pale yellow colorless
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
Translucent
Transparent
Refractive Index
1.37-1.521.614-1.666
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
-99990.014-0.032
0
0.296
👆🏻
Clarity
Translucent
Transparent