Luster
Waxy, Silky, Resinous, Greasy
Vitreous
Pleochroism
-
X = red; Y = yellow-orange; Z = emerald-green
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
TranslucentHerve Nicolas Lazzarelli
Transparent, Translucent, Transparent to translucent
Refractive Index
1.530-1.5751.746-1.763
1
3.25
👆🏻
Optic Character
-
Biaxial/+
Crystal System
-
Orthorhombic
Birefringence
-99990.007-0.013
0
0.296
👆🏻
Clarity
TranslucentHerve Nicolas Lazzarelli
Transparent