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Marcasite (Iron Sulfide)

From Ohio History Central
Revision as of 17:11, 27 April 2013 by Unknown user (talk)


The name marcasite comes from a French word whose origin is unclear. This mineral has the same chemical makeup as pyrite but its crystal structure is different. The term marcasite sometimes is used for small pieces of polished and faceted pieces of jewelry, which actually are made of pyrite. Marcasite itself is not used as a gem. Sometimes marcasite specimens disintegrate into a white powder. The cause of this "decay" is not known.

Facts

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