VS
Name
—
Fe²⁺Fe³⁺₂S₄
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Cubic
Crystal system
—
4–4.5
Mohs hardness
—
4.049
Specific gravity
—
—
Streak
—
Metallic. R: (400) 30.5, (420) 31.1, (440) 31.7, (460) 32.2, (480) 32.7, (500) 33.2, (520) 33.6, (540) 34.2
Luster
—
—
Cleavage
—
Fd3m
Space group
—
Spinel
Structural group
—
Grg · Approved
IMA
—
1963
Named in
—
Pale pink, tarnishing to a metallic blue; sooty black when very fine grained; in polished section
Typical colors
—
Fe · S
Elements
—