Optical Properties
Luster
Vitreous
Vitreous
Pleochroism
Weak
Strong trichroism: colorless pink violetHerve Nicolas Lazzarelli
Dispersion
Not Available
0.02
22
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.662-1.707
1.657-1.681
Optic Character
Not Available
Not Available
Crystal System
Triclinic
monoclinic
Birefringence
0.013-0.015
0.014-0.016
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
