Optical Properties
Luster
Not Available
Vitreous
Pleochroism
Strong dichroism: blue to colourless\
Weak
Dispersion
Not Available
Not Available
Transparency
Transparent
Transparent
Refractive Index
1.560-1.604
1.818-1.909
Optic Character
Not Available
Not Available
Crystal System
Not Available
Orthorhombic
Birefringence
0.003-0.010
0.091
Clarity
Transparent
Transparent
