VS
Name
—
CuAs₂
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Monoclinic
Crystal system
—
3.5–4
Mohs hardness
—
5.4
Specific gravity
—
Black
Streak
—
Metallic, tarnishing black. Anisotropism: Very strong; in pale gray-green and dark brown with violet tint
Luster
—
Perfect along {010}
Cleavage
—
P2_1/c
Space group
—
Arsenopyrite
Structural group
—
Pax · Approved
IMA
—
1961
Named in
—
Pale steel-gray on fresh surface; in polished section, very pale gray
Typical colors
—
Cu · As
Elements
—