VS
Name
—
Cr₂O₃
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
8
Mohs hardness
—
5.18
Specific gravity
—
Pale green
Streak
—
Vitreous
Luster
—
—
Cleavage
—
R-3c
Space group
—
Corundum
Structural group
—
Esk · Grandfathered
IMA
—
1958
Named in
—
Black to dark green; gray in reflected light, with emerald-green internal reflections
Typical colors
—
Cr · O
Elements
—