Luster
Pleochroism
Dispersion
Transparency
Refractive Index
Optic Character
Crystal System
Birefringence
Clarity
Very strong: pale yellow colorless
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Strong dichroism: yellow green Lazzarelli
Transparent, Translucent, Transparent to translucent