VS
Name
—
CuS₂
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Monoclinic
Crystal system
—
4.5
Mohs hardness
—
4.4–4.5
Specific gravity
—
Sooty black
Streak
—
Dull metallic. R: (400) 30.1, (420) 29.7, (440) 29.2, (460) 28.7, (480) 28.1, (500) 27.4, (520) 26.8, (540) 26.3
Luster
—
Perfect pseudocubic
Cleavage
—
P2_1
Space group
—
Pyrite
Structural group
—
Vil · Approved
IMA
—
1920
Named in
—
Iron-black; pale blue-gray to violet-gray in reflected light
Typical colors
—
Cu · S
Elements
—