1 Optical Properties
1.1 Luster
Waxy, Silky, Resinous, Greasy
Vitreous
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
1.4 Transparency
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Transparent, Translucent, Transparent to translucent
1.5 Refractive Index
1.530-1.5751.52-1.56
1
3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
Not AvailableNot Available
0
0.296
1.9 Clarity
TranslucentHerve Nicolas Lazzarelli
Transparent to translucent