VS
Name
—
Co²⁺Co³⁺₂S₄
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Cubic
Crystal system
—
4.5–5.5
Mohs hardness
—
4.5–4.8
Specific gravity
—
—
Streak
—
Metallic, easily tarnished. R: (400) 41.5, (420) 41.8, (440) 42.2, (460) 43.0, (480) 44.0, (500) 45.0, (520) 46.0
Luster
—
Imperfect on {001}
Cleavage
—
Fd3m
Space group
—
Spinel
Structural group
—
Lin · Grandfathered
IMA
—
1845
Named in
—
Pale gray to steel-gray
Typical colors
—
Co · S
Elements
—