pyrite
/ˈpaɪˌɹaɪt/ noun C2- The common mineral iron disulfide (FeS₂), of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric system.
- Any metallic-looking sulphide, such as the above, which is the most common.
- (usually as a plural: pyrites) Any metal dichalcogenide that is isostructural to the common mineral. · Copper diselenide can occur both as a marcasite and a pyrite.
Plural pyrites
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