Optical Properties
Luster
Vitreous
Vitreous, Pearly
Pleochroism
AbsentWalter Schumann
Weak; O = colorless to yellow; E = colorless to honey-yellow
Dispersion
0.01
29
Not Available
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.450-1.550
1.610-1.647
Optic Character
Not Available
Not Available
Crystal System
Amorphous
tetragonal
Birefringence
Not Available
0.021
Clarity
Transparent
Transparent
