Optical Properties
Luster
Vitreous
Not Available
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Not Available
Dispersion
None
Not Available
Transparency
Translucent, Translucent to opaque
Transparent, Translucent
Refractive Index
1.669-1.723
1.758-1.780
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Not Available
Birefringence
0.011-0.037
0.007-0.010
Clarity
Translucent
Transparent
