Optical Properties
Luster
Vitreous
Vitreous
Pleochroism
X = red; Y = yellow-orange; Z = emerald-green
Strong trichroism: colorless pink violetHerve Nicolas Lazzarelli
Dispersion
0.02
24
0.02
22
Transparency
Transparent, Translucent, Transparent to translucent
Transparent
Refractive Index
1.746-1.763
1.657-1.681
Optic Character
Biaxial/+
Not Available
Crystal System
Orthorhombic
monoclinic
Birefringence
0.007-0.013
0.014-0.016
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
