Optical Properties
Luster
Not Available
Vitreous
Pleochroism
Not Available
AbsentWalter Schumann
Dispersion
Not Available
None
Transparency
Not Available
Translucent, Transparent to nearly opaque
Refractive Index
Not Available
1.535-1.539
Optic Character
Not Available
Not Available
Crystal System
Not Available
Trigonal
Birefringence
Not Available
0.003-0.009
Clarity
Not Available
Translucent
