Luster
Vitreous
Vitreous, Adamantine, Pearly
Pleochroism
Weak: pink pale pinkHerve Nicolas Lazzarelli
-
Dispersion
0.010.01
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to translucent
-
Refractive Index
1.544-1.5531.552-1.562
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Hexagonal
monoclinic
Birefringence
0.0090.009
0
0.296
👆🏻
Clarity
TranslucentHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda