proustite

Noun

Meaning

A sulphide of arsenic and silver of a beautiful cochineal-red color, occurring in rhombohedral crystals, and also massive; ruby silver.

Source: Webster's dictionary

cinnabar orpiment galena chalcopyrite covellite argentite chalcocite realgar sphalerite bornite stibnite enargite tetrahedrite pyrargyrite tennantite

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