Luster
Vitreous
Waxy, Silky, Resinous, Greasy
Pleochroism
Weak: yellowish brown yellowAnthony et al
-
Dispersion
0.010.01
0.005
1
👆🏻
Transparency
-
TranslucentHerve Nicolas Lazzarelli
Refractive Index
1.509-1.5411.530-1.575
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
-
Birefringence
0.030-9999
0
0.296
👆🏻
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TranslucentHerve Nicolas Lazzarelli