Optical Properties
Luster
Vitreous, Greasy
Vitreous, Pearly
Pleochroism
Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al
colorless.
Dispersion
Not Available
0.01
28
Transparency
Transparent
Gemmological Tables (2004) More from other references
Refractive Index
1.647-1.667
1.518-1.536
Optic Character
Not Available
Not Available
Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c
monoclinic
Birefringence
0.012
0.0050-0.0060
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
