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 …

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 …

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

Apr 26, 2018 · Magnetite is a naturally occurring mineral that is one of the most common iron ores and is widely distributed throughout the world. It is a black, metallic-looking mineral with a …

Nov 29, 2011 · Magnetite is a naturally magnetic iron oxide mineral. Learn about its crystal structure, magnetic properties, and significance in geology.

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 …

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 …

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 …

Common accessory mineral in igneous and metamorphic rocks. Can be biogenically produced by a wide variety of organisms. Many localities and environments world wide. Link to MinDat.org …