Optical Properties
Luster
Subadamantine, Resinous
Vitreous, Resinous
Pleochroism
Strong: X = nearly colorless; Y = yellow to green; Z = red to yellow-orange
X = emerald green
Dispersion
Not Available
Not Available
Transparency
Not Available
Gemmological Tables (2004) More from other references
Refractive Index
1.885-1.990
1.720-1.778
Optic Character
Not Available
Not Available
Crystal System
monoclinic
monoclinic
Birefringence
0.105-0.135
0.037-0.061
Clarity
Not Available
Gemmological Tables (2004) More from other references
