Optical Properties
Luster
Vitreous, Pearly
Not Available
Pleochroism
From the Congo
Not Available
Dispersion
0.01
28
Not Available
Transparency
Transparent, Translucent, Transparent to translucent
Translucent
Refractive Index
1.554-1.573
Not Available
Optic Character
Not Available
Not Available
Crystal System
Triclinic
Not Available
Birefringence
0.008-0.010
Not Available
Clarity
Transparent
Translucent
