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Magnetite is a heavy material, black or brownish-black with a metallic luster. It is the most magnetic of all natural commonly occurring minerals on the Earth.

The originally bright black colour can gradually change to dark brown. Magnetite is often used in jewelry due to its supposed magnetic healing properties.

Natural magnets (lodestones) were known to ancient Greeks, who called this mineral “magnet”, because it was found in the lands of the Magnetes (Magnesia) in Thessaly, Greece. 

Common igneous accessory mineral and in sedimentary banded iron formations.  Magnetite is one of the two common naturally occurring iron oxides and a member of the spinel group. Magnetite is the most magnetic of all the naturally occurring minerals on Earth.

Small grains of magnetite occur in almost all igneous and metamorphic rocks. It is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and a black streak.