Luster
Pleochroism
Dispersion
Transparency
Refractive Index
Optic Character
Crystal System
Birefringence
Clarity
Distinct: light yellow-green to light bluE
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c