Compare Minerals

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

Mineral A

Mineral B

Arsmirandite

Name

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Na₁₈Cu₁₂Fe³⁺O₈(AsO₄)₈Cl₅

Formula

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Mineral Species

Entry type

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Arsenates

Chemical class

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Monoclinic

Crystal system

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Mohs hardness

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3.715

Specific gravity

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Grayish green with olive hue

Streak

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Strong vitreous

Luster

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None

Cleavage

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C2/m

Space group

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Arsmirandite

Structural group

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Asm · Approved

IMA

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2014

Named in

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Dark grayish green to olive-greenish black, dark gray in reflected light

Typical colors

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Na · Cu · Fe · O · As · Cl

Elements

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