VS
Name
—
Cu₅.₂Se₆
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Hexagonal
Crystal system
—
2–3
Mohs hardness
—
5.99
Specific gravity
—
—
Streak
—
Metallic when freshly broken, soon becoming dull. Anisotropism: Strong; brownish gray to gray-white
Luster
—
Perfect on {0001}
Cleavage
—
P6_3/mmc
Space group
—
Covellite
Structural group
—
Kl · Grandfathered
IMA
—
1928
Named in
—
Slate-gray, tarnishing to blue-black
Typical colors
—
Cu · Se
Elements
—