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Oldhamite is a mineral composed of calcium sulfide (CaS) and is found in meteorites. The name "oldhamite" is derived from Thomas Oldham, an Irish geologist who died in 1878, combined with the suffix "-ite" commonly used for minerals. The term "Oldham" also refers to a borough in Greater Manchester, England, named after the Oldham family who resided there during the Middle Ages. This area was historically known for its woolen industry and later became a significant cotton-spinning and weaving town.123

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