VS
Name
—
Cu₃FeS₄
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Tetragonal
Crystal system
—
2.5–3.5
Mohs hardness
—
4.2
Specific gravity
—
—
Streak
—
Metallic. Anisotropism: Strong, reddish orange to reddish brown. R1 –R2: (400) 13.9–17.7, (420) 14.8–18.5
Luster
—
—
Cleavage
—
I-42m
Space group
—
Sphalerite, Stannite
Structural group
—
Ida · Grandfathered
IMA
—
1958
Named in
—
Coppery red to pinchbeck-brown, bornitelike but not tarnished
Typical colors
—
Cu · Fe · S
Elements
—