Compare Minerals

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

Mineral A

Mineral B

Fersmite

Name

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(Ca,Ce,Na)(Nb,Ta,Ti)₂(O,OH,F)₆

Formula

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Mineral Species

Entry type

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Halides

Chemical class

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Orthorhombic

Crystal system

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4–4.5

Mohs hardness

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4.69–4.8

Specific gravity

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Grayish brown

Streak

—

Resinous to subvitreous, submetallic

Luster

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{100}, parting

Cleavage

—

Pcan

Space group

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Columbite

Structural group

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Fsm · Grandfathered

IMA

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1946

Named in

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Black, dark brown, lemon-yellow to yellow-brown; dark honey-yellow in thin section

Typical colors

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Ca · Ce · Na · Nb · Ta · Ti · O · H · F

Elements

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