Optical Properties
Luster
Vitreous, Silky
Resinous
Pleochroism
X = blue
AbsentWalter Schumann
Dispersion
Not Available
Not Available
Transparency
Not Available
Transparent, Translucent
Refractive Index
1.680-1.698
1.539-1.545
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Amorphous
Birefringence
0.005-0.008
Not Available
Clarity
Not Available
Transparent
