Compare Minerals

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

Mineral A

Mineral B

Postite

Name

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Mg(H₂O)₆Al₂(OH)₂(H₂O)₈(V₁₀O₂₈)·13H₂O

Formula

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Mineral Species

Entry type

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Oxides & Hydroxides

Chemical class

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Orthorhombic

Crystal system

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Mohs hardness

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2.226

Specific gravity

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Yellow

Streak

—

Subadamantine

Luster

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Perfect ∥ [001] likely on {100} and {010}, good on {001}

Cleavage

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Pccn

Space group

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Pascoite

Structural group

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Pos · Approved

IMA

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2011

Named in

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Golden yellow

Typical colors

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Mg · H · O · Al · V

Elements

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