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Compare Minerals

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

Mineral A

VS

Mineral B

Harmunite

Name

—

CaFe₂O₄

Formula

—

Mineral Species

Entry type

—

Oxides & Hydroxides

Chemical class

—

Orthorhombic

Crystal system

—

5.5

Mohs hardness

—

4.404

Specific gravity

—

—

Streak

—

—

Luster

—

—

Cleavage

—

Pnma

Space group

—

Post-spinel

Structural group

—

Hmu · Approved

IMA

—

2012

Named in

—

Black, light gray with red internal reflections in reflected light

Typical colors

—

Ca · Fe · O

Elements

—