1 Optical Properties
1.1 Luster
Waxy, Silky, Resinous, Greasy
Vitreous
1.2 Pleochroism
Not Available
X = red; Y = yellow-orange; Z = emerald-green
1.3 Dispersion
1.4 Transparency
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Transparent, Translucent, Transparent to translucent
1.5 Refractive Index
1.530-1.5751.746-1.763
1
3.25
1.6 Optic Character
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
Not Available0.007-0.013
0
0.296
1.9 Clarity
TranslucentHerve Nicolas Lazzarelli
Transparent