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A reddish-bronze mineral consisting of iron sulphide, typically forming massive or granular deposits.
- ‘Microcrystals of pyrrhotite, goethite, pyrite, galena, and calcite are found on the dumps.’
- ‘We have not yet found any unaltered material to verify that the original mineral was pyrrhotite, as claimed by Brush.’
- ‘We have also seen several specimens in which pyrite has replaced a hexagonal mineral that was probably pyrrhotite.’
- ‘Other sulfides, including pyrite, marcasite, chalcopyrite, and pyrrhotite, are occasionally found as well.’
- ‘Secondary titanite, chlorite, white mica and pyrrhotite are abundant, and some samples contain metamorphic biotite.’
Mid 19th century: from Greek purrhotēs ‘redness’ + -ite.
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