Compare Minerals

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

Mineral A

Mineral B

Name

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Na₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂

Formula

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Mineral Species

Entry type

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Silicates

Chemical class

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Monoclinic

Crystal system

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Mohs hardness

—

3.12–3.29

Specific gravity

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Streak

—

[Vitreous.]

Luster

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[Perfect on {110}, intersecting at ~58° and ~122°; partings on {010}, {001}.]

Cleavage

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Space group

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Amphibole

Structural group

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Mrbk · Approved

IMA

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1957

Named in

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Blue, black; light blue in thin section

Typical colors

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Na · Mg · Fe · Si · O · H

Elements

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