1 Optical Properties
1.1 Luster
Not Available
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
1.4 Transparency
Gemmological Tables (2004)
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
1.5 Refractive Index
Not Available1.530-1.575
1
3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Not Available
1.8 Birefringence
Not AvailableNot Available
0
0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TranslucentHerve Nicolas Lazzarelli