Optical Properties
Luster
Vitreous, Pearly
Vitreous
Pleochroism
Not Available
AbsentWalter Schumann
Dispersion
Not Available
None
Transparency
Not Available
Translucent, Transparent to nearly opaque
Refractive Index
1.535
1.535-1.539
Optic Character
Not Available
Not Available
Crystal System
Triclinic
Trigonal
Birefringence
0.0140
0.003-0.009
Clarity
Not Available
Translucent
