VS
Name
—
Co³⁺O(OH)
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
3–5
Mohs hardness
—
3.07–4.32
Specific gravity
—
Dark brown
Streak
—
Dull to vitreous
Luster
—
In crystals, {0001}
Cleavage
—
R-3m
Space group
—
—
Structural group
—
Htg · Approved
IMA
—
1872
Named in
—
Black, blackish brown, reddish brown; in reflected light, white with brownish tinge
Typical colors
—
Co · O · H
Elements
—