VS
Name
—
CaMn³⁺₂O₄
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Orthorhombic
Crystal system
—
6.5
Mohs hardness
—
4.64
Specific gravity
—
Reddish brown
Streak
—
Adamantine
Luster
—
Perfect on {100}; good on {001}
Cleavage
—
Pbcm
Space group
—
Post-spinel
Structural group
—
Mro · Approved
IMA
—
1963
Named in
—
Black; in reflected light, gray to brown, with carmine-red internal reflections
Typical colors
—
Ca · Mn · O
Elements
—