copper pyrites

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copper pyrites:

see chalcopyritechalcopyrite
or copper pyrites
, brass-yellow mineral, sometimes with an iridescent tarnish. It is a sulfide of copper and iron, CuFeS2 . It crystallizes in the tetragonal system but is usually found in the massive form.
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References in periodicals archive ?
The cap (gossan) contains but little of the copper ores, copper pyrites, copper glance, and the customary oxidized ores, azurite, malachite, cuprite and native copper.