Luster
Vitreous, Greasy, Pearly
Vitreous
Pleochroism
Faint
Distinct
Dispersion
0.020.02
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.717-1.7221.606-1.649
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Hexagonal
monoclinic
Birefringence
0.100-9999
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
-