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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Mg₂(Fe³⁺,Mg,Al,Sb⁵⁺)O₂(BO₃)

Formula

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Mineral Species

Entry type

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Borates

Chemical class

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Orthorhombic

Crystal system

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Mohs hardness

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3.72

Specific gravity

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Pale grayish green

Streak

—

Vitreous to silky

Luster

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Cleavage

—

Pbam

Space group

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Structural group

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Csm · Approved

IMA

—

1986

Named in

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Grayish green to black; surface (diffraction grating) iridescence is typical

Typical colors

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Mg · Fe · Al · Sb · O · B

Elements

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