Magnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+ 2O4.

What is Magnetite? Magnetite is a very common iron oxide (Fe 3 O 4) mineral that is found in igneous, metamorphic, and sedimentary rocks. It is the most commonly mined ore of iron. It is also the mineral …

Magnetite is a black, opaque, magnetic mineral that leaves a black streak when rubbed across a hard rough surface. It is one of the most abundant metal oxides, and its crystal structure contains both the …

Detailed description, properties, and locality information guide about the magnetic mineral magnetite.

Dec 19, 2025 · All are magnetic, although franklinite and jacobsite are only weakly so; magnetite, which frequently has distinct north and south poles, has been known for this property since about 500 bc.

Jul 26, 2025 · Magnetite is a common iron oxide mineral with the chemical formula Fe3O4. It appears opaque black or dark brown, exhibiting a metallic to dull luster. This mineral registers between 5.5 …

Feb 15, 2025 · Magnetite consists of a ferrimagnetic mineral formed by ferreous and ferric iron, whose chemical formula is Fe 3 O 4, with some possible content of magnesium and bivalent manganese. It …

Magnetite is an oxide mineral of iron and has the composition Fe 3 O 4. This crystal shows the characteristic geometry. The sample is from Binnatal, Valais, Switzerland. The sample width is about …

Magnetite has been found on every continent and on other planetary bodies, including Mars. Tiny crystals of magnetite have even been discovered inside living organisms—ranging from bacteria to …

Magnetite is one of the most ubiquitous of all minerals, occurring in a wide variety of igneous, metamorphic, and sedimentary rocks. It usually occurs as small disseminated crystals or grains …