1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Adamantine, Vitreous, Adamantine
1.2 Pleochroism
Not Available
Strong: purplish-red
1.3 Dispersion
1.4 Transparency
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Transparent, Translucent, Transparent to opaque
1.5 Refractive Index
1.590-1.6291.762-1.778
1
3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)
Trigonal
1.8 Birefringence
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent