Luster
Greasy, Pearly
Vitreous
Pleochroism
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
-
Dispersion
0.120.01
0.005
1
👆🏻
Transparency
Translucent
-
Refractive Index
1.678-1.7581.735-1.745
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Triclinic
Orthorhombic
Birefringence
0.0500.012
0
0.296
👆🏻
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda