Compare Minerals
Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.
Name
—
K₂Zn₅Fe³⁺₃Al(SO₄)₁₂·18H₂O
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Cubic
Crystal system
—
3
Mohs hardness
—
2.765
Specific gravity
—
Grayish green
Streak
—
Vitreous on crystal surfaces, pitchy to resinous
Luster
—
—
Cleavage
—
Fd3c
Space group
—
Voltaite
Structural group
—
Zvlt · Approved
IMA
—
1985
Named in
—
Green-black to oil-green; yellowish green in transmitted light
Typical colors
—
K · Zn · Fe · Al · S · O · H
Elements
—