magnetite

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magnetite

magnetite , lustrous black, magnetic mineral, Fe ₃ O ₄ . 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.

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magnetite

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

magnetite Iron oxide mineral (Fe₃O₄). It is a valuable iron ore, found in igneous and metamorphic rocks. It is black, metallic and brittle. Permanently magnetized deposits are called lodestone. Hardness 6; r.d. 5.2.

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Free newspaper and magazine articles

	Magnetite: Zinc Corporation of America Mine No. 4, St. Lawrence County, New York.(CONNOISSEUR'S CHOICE) Magazine article from: Rocks & Minerals; 5/1/2008
	Borealis Exploration Limited Announces Initial Results on INAA Gold Assays, Roche Bay Magnetite Deposits, NWT, Canada. Business Wire; 11/6/1997
	USCorp Announces Discovery of High Titanium Magnetite at Twin Peaks Property. Business Wire; 11/8/2007

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	Magnetite: Zinc Corporation of America Mine No. 4, St. Lawrence County, New York.(CONNOISSEUR'S CHOICE) Magazine article from: Rocks & Minerals; 5/1/2008; ; 700+ words ; ...early attempts to produce iron were from magnetite occurrences, some of which were the...many small iron furnaces that exploited magnetite ores. Interestingly, some of the most spectacular magnetite specimens to be found in the United States...
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