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Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.

VS
Posnjakite
Posnjakite
Name
—
Cu₄(SO₄)(OH)₆·H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Monoclinic
Crystal system
—
1.5–3
Mohs hardness
—
3.32
Specific gravity
—
Pale blue
Streak
—
Vitreous
Luster
—
—
Cleavage
—
Pa
Space group
—
—
Structural group
—
Pnk · Approved
IMA
—
1967
Named in
—
Blue to dark blue
Typical colors
—
Cu · S · O · H
Elements
—