Optical Properties
Luster
Vitreous
Vitreous
Pleochroism
WeakMichael OâDonoghue
Weak
Dispersion
Not Available
Not Available
Transparency
Translucent
Translucent
Refractive Index
1.514-1.539
1.607-1.612
Optic Character
Not Available
Not Available
Crystal System
Triclinic Pinacoidal H-M Symbol ( 1) Space Group: C1
Hexagonal
Birefringence
0.008-0.010
0.003
Clarity
Translucent
Translucent
