1 Optical Properties
1.1 Luster
Pearly, Greasy
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
Distinct: light yellow-green to light bluE
Not Available
1.3 Dispersion
1.4 Transparency
Transparent
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
1.5 Refractive Index
1.571-1.5971.530-1.575
1
3.25
1.6 Optic Character
1.7 Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Not Available
1.8 Birefringence
Not AvailableNot Available
0
0.296
1.9 Clarity
Transparent
TranslucentHerve Nicolas Lazzarelli