Compare Minerals

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

Mineral A

Mineral B

Johnbaumite

Name

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Ca₅(AsO₄)₃(OH)

Formula

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Mineral Species

Entry type

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Arsenates

Chemical class

—

Hexagonal

Crystal system

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4.5

Mohs hardness

—

3.68

Specific gravity

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White

Streak

—

Adamantine to greasy on fracture surfaces, vitreous on cleavage surfaces

Luster

—

Distinct on {1010}

Cleavage

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P6_3/m

Space group

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Apatite

Structural group

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Jbm · Approved

IMA

—

1980

Named in

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Grayish white; colorless in thin section

Typical colors

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Ca · As · O · H

Elements

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