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The mineral form of black iron oxide, Fe3O4, that often occurs with magnesium, zinc, and manganese and is an important ore of iron.
(Minerals) a black magnetic mineral, found in igneous and metamorphic rocks and as a separate deposit. It is a source of iron. Composition: iron oxide. Formula: Fe3O4. Crystal structure: cubic
a common black mineral, ferrous and ferric iron oxide, FeFe2O4, that is the most magnetic mineral and an important iron ore.
A usually brown to black, magnetic mineral composed of iron and magnesium oxide. Magnetite occurs in many different types of rocks, commonly as small octahedrons. It is an important source of iron.
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|Noun||1.||magnetite - an oxide of iron that is strongly attracted by magnets|
emery - a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper)
iron ore - an ore from which iron can be extracted