Optical Properties
Luster
Adamantine
Vitreous, Pearly, Resinous
Pleochroism
Not Available
Not Available
Dispersion
Not Available
Not Available
Transparency
Transparent, Opaque, Transparent to opaque
Transparent, Translucent
Refractive Index
1.888-1.889
1.540-1.550
Optic Character
Not Available
Not Available
Crystal System
Isometric
tetragonal
Birefringence
Not Available
0.004-0.008
Clarity
Transparent to opaque
Transparent
