VS
Name
—
AgFe₂S₃
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Orthorhombic
Crystal system
—
1–1.5
Mohs hardness
—
4.1–4.21
Specific gravity
—
Black
Streak
—
Metallic, brilliant on {001}
Luster
—
Perfect on {001}
Cleavage
—
Ccmb
Space group
—
Cubanite
Structural group
—
Srn · Grandfathered
IMA
—
1827
Named in
—
Pinchbeck-brown, may tarnish blue-violet on selected faces; in reflected light, pale brown
Typical colors
—
Ag · Fe · S
Elements
—