Luster
Vitreous
Vitreous
Pleochroism
Weak: pink pale pinkHerve Nicolas Lazzarelli
Strong dichroism: yellow green Lazzarelli
Dispersion
0.010.01
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to translucent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.544-1.5531.565-1.602
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Hexagonal
Hexagonal
Birefringence
0.0090.0040-0.0070
0
0.296
👆🏻
Clarity
TranslucentHerve Nicolas Lazzarelli
-