VS
Name
—
Cu₂(PO₄)(OH)
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Orthorhombic
Crystal system
—
4
Mohs hardness
—
3.97
Specific gravity
—
—
Streak
—
Vitreous, greasy on fracture surfaces
Luster
—
Imperfect on {100} and {010}
Cleavage
—
Pnnm
Space group
—
Andalusite
Structural group
—
Lib · Grandfathered
IMA
—
1823
Named in
—
Light to dark olive-green, dark green, blackish green, black; bluish green to pale green in transmitted light
Typical colors
—
Cu · P · O · H
Elements
—