Chemical Formula

Ca3Cr2(SiO4)3

Hardness (Mohs)

6.5-7

Crystal System

Isometric

Streak

White

Luster

Vitreous to sub-adamantine

Diaphaneity

Transparent to translucent

Color

Emerald-green

Crystal Habit / Mode of Occurrence

Dodecahedral, trapezohedral, rarely hexoctahedral crystals; granular, massive