Optical Properties
Luster
Adamantine
Not Available
Pleochroism
Not Available
Not Available
Dispersion
Not Available
Not Available
Transparency
Transparent, Opaque, Transparent to opaque
Gemmological Tables (2004)
Refractive Index
1.888-1.889
1.720-1.740
Optic Character
Not Available
Not Available
Crystal System
Isometric
Not Available
Birefringence
Not Available
Not Available
Clarity
Transparent to opaque
TransparentUlrich Henn and Claudio C. Milisenda
