VS
Name
—
Ag₅Cu₃S₄
Formula
—
Mineral Species
Entry type
—
Sulfides
Chemical class
—
Orthorhombic
Crystal system
—
—
Mohs hardness
—
6.61
Specific gravity
—
Dark steel-gray. Anisotropism: Strong, in gray
Streak
—
—
Luster
—
One, poorly developed
Cleavage
—
Pnma
Space group
—
—
Structural group
—
Mck · Approved
IMA
—
1966
Named in
—
Steel-gray on fresh surface, becoming dark gray to black on long exposure; in polished section
Typical colors
—
Ag · Cu · S
Elements
—