Optical Properties
Luster
Vitreous
Greasy, Pearly
Pleochroism
Absent
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Dispersion
None
Not Available
Transparency
Translucent
Translucent
Refractive Index
1.530-1.543
1.678-1.758
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Triclinic
Birefringence
0.004
0.050
Clarity
Translucent
Translucent
