VS
Name
—
(Cu₁₋ₓAlₓ)(SO₄)ₓ/₂(OH)₂·nH₂O (x < 0.5, n < 3x/2)
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
—
Crystal system
—
—
Mohs hardness
—
2.38
Specific gravity
—
—
Streak
—
—
Luster
—
—
Cleavage
—
—
Space group
—
Woodwardite, Hydrotalcite
Structural group
—
Wwd · Grandfathered
IMA
—
1866
Named in
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Rich turquoise-blue to greenish blue
Typical colors
—
Cu · Al · S · O · H
Elements
—