Luster
Pleochroism
Dispersion
Transparency
Refractive Index
Optic Character
Crystal System
Birefringence
Clarity
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Distinct trichroism: yellow green green blue greenHerve Nicolas Lazzarelli
TransparentUlrich Henn and Claudio C. Milisenda