VS
Name
—
CuMnO₂
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Monoclinic
Crystal system
—
4
Mohs hardness
—
4.98–5.34
Specific gravity
—
Soot-black, with a brownish tint
Streak
—
Metallic
Luster
—
Perfect parallel to plate surfaces, {001}; also {100}, perfect, {111}, prominent, {111} and {212}, poor
Cleavage
—
C2/m
Space group
—
—
Structural group
—
Cnr · Grandfathered
IMA
—
1849
Named in
—
Bright gray to iron-black; cream-white in reflected light
Typical colors
—
Cu · Mn · O
Elements
—