Optical Properties
Luster
Vitreous, Resinous
Not Available
Pleochroism
X = emerald green
Not Available
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004)
Refractive Index
1.720-1.778
1.53-1.69
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Not Available
Birefringence
0.037-0.061
0.16
Clarity
Gemmological Tables (2004) More from other references
Gemmological Tables (2004)
