VS
Name
—
Cu₃As
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Cubic
Crystal system
—
3–3.5
Mohs hardness
—
7.2–7.9
Specific gravity
—
—
Streak
—
Metallic. R: (400) 41.1, (420) 41.4, (440) 41.7, (460) 43.1, (480) 45.2, (500) 47.5, (520) 49.3, (540) 50.7
Luster
—
—
Cleavage
—
I-43d
Space group
—
Domeykite
Structural group
—
Do · Grandfathered
IMA
—
1845
Named in
—
Tin-white to steel-gray, tarnishes pale yellow, then pale brown, and finally to iridescence
Typical colors
—
Cu · As
Elements
—