Luster
-
Pearly, Vitreous
Pleochroism
Definite: brown reddish-brownWalter Schumann
Distinct
Dispersion
0.010.02
0.005
1
👆🏻
Transparency
Transparent, Translucent
-
Refractive Index
1.544-1.5531.565-1.625
1
3.25
👆🏻
Optic Character
-
-
Crystal System
-
monoclinic
Birefringence
0.0090.040-0.050
0
0.296
👆🏻
Clarity
Transparent
-