Optical Properties
Luster
Adamantine
Vitreous
Pleochroism
Very weak
Not Available
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent, Transparent to translucent
Refractive Index
2.583-2.741
1.52-1.56
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.117
Not Available
Clarity
Gemmological Tables (2004) More from other references
Transparent to translucent
