Luster
Pleochroism
Dispersion
Transparency
Refractive Index
Optic Character
Crystal System
Birefringence
Clarity
Weakly pleochroic with O reddish and E greenish in thick sections.
TransparentUlrich Henn and Claudio C. Milisenda
Strong: dark red pinkish-redHerve Nicolas Lazzarelli