Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A mineral, Ag3AsS3, often found with pyragyrite in silver veins.

from the GNU version of the Collaborative International Dictionary of English

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

from The Century Dictionary and Cyclopedia

  • n. A native sulphid of arsenic and silver, occurring in rhombohedral and scalenohedral crystals and also massive.

Etymologies

Named after French chemist Joseph L. Proust (1754-1826) in 1832. (Wiktionary)

Examples

  • There are various other silver minerals including: [[cerargirite]] (AgCl), [[proustite]] (3Ag2S. Ag2S.), [[pirargirite]] (3Ag2S. Sb2S3),

    CreationWiki - Recent changes [en]

  • "ruby silver," stephanite or "black silver," and polybasite; the silver-arsenic sulphides, proustite or "light ruby silver" and pearcite; and the silver antimonide, dyscrasite.

    The Economic Aspect of Geology

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