Optical Properties
Luster
Not Available
Not Available
Pleochroism
NoneWalter Schumann
Strong: dark blue light blueWalter Schumann
Dispersion
None
0.02
22
Transparency
Translucent
Transparent, Translucent
Refractive Index
1.535-1.570
1.614-1.666
Optic Character
Not Available
Not Available
Crystal System
Not Available
Not Available
Birefringence
Not Available
0.014-0.040
Clarity
Translucent
Transparent
