1 Optical Properties
1.1 Luster
Vitreous
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
Not Available
Not Available
1.3 Dispersion
1.4 Transparency
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
1.5 Refractive Index
1.590-1.6291.530-1.575
1
3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)
Not Available
1.8 Birefringence
0.039Not Available
0
0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TranslucentHerve Nicolas Lazzarelli