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magnetite

   Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson 0.02 sec.
magnetite (măg`nətīt), lustrous black, magnetic mineral, Fe3O4. It occurs in crystals of the cubic system, in masses, and as a loose sand. It is one of the important ores of iron (magnetic iron ore) and is a common constituent of igneous and metamorphic rocks. It is found in Norway, Sweden, the Urals, and various parts of the United States. A variety of magnetite, lodestone (or loadstone) exhibits polarity and is especially interesting for its natural magnetism; Magnet Cove, Ark., became famous as a source.

magnetite

 or lodestone or magnetic iron ore

Iron oxide mineral (Fe3O4), the chief member of one of the series of the spinel group. Minerals in this series form black to brownish, metallic, moderately hard octahedrons and masses in igneous and metamorphic rocks and in granite pegmatites, stony meteorites, and high-temperature sulfide veins. Magnetite, as the name implies, is strongly attracted to a magnet. It is a common constituent of iron ores. Magnetite with an intrinsic magnetic field (a natural magnet) is known as lodestone.


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That knowledge, in turn, permits the age of other murals to be deduced from the alignment of their magnetite particles.
Other lifelike features within the meteorite include carbonate globules and mineral grains of magnetite within those globules.
NEW YORK -- Fitch Ratings affirms six classes of notes issued by Magnetite IV CLO, Ltd.
 
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