Optical Properties
Luster
Vitreous
Vitreous
Pleochroism
Not Available
Blue stones strong trichroism: colorless/pale blue (greenish or violet)-blue dark blueHerve Nicolas Lazzarelli
Dispersion
Not Available
0.02
18
Transparency
Transparent
Transparent
Refractive Index
1.590-1.599
1.710-1.735
Optic Character
Not Available
Biaxial/+
Crystal System
Not Available
Not Available
Birefringence
0.009
0.012-0.033
Clarity
Transparent
Transparent
