M MineralystRock & Mineral Guide
Mineral

Magnetite

Magnetite — reference photo

Magnetite is a mineral with the chemical formula Fe3O4. It has a Mohs hardness of 5.5 - 6.5 and metallic luster.

Magnetite properties

TypeMineral
Chemical formulaFe3O4
Mohs hardness5.5 - 6.5
LusterMetallic
Typical colorsBlack to dark brown
FormationMagnetite typically forms in igneous and metamorphic environments.
Rarity3 / 10

Mohs hardness 5.5–6.5 — fairly hard

1 · Talc5 · Apatite10 · Diamond
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