Optical Properties
Luster
Vitreous, Pearly
Vitreous
Pleochroism
visible
Common trichroism: light green
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004) More from other references
Gems, Sixth Edition (2006)
Refractive Index
1.578-1.639
1.668-1.703
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
monoclinic
Birefringence
0.037-0.039
0.024-0.030
Clarity
Gemmological Tables (2004) More from other references
Gems
