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Definitions

Century Dictionary and Cyclopedia

  1. n. A native sulphid of arsenic and silver, occurring in rhombohedral and scalenohedral crystals and also massive. It has a beautiful cochineal-red color, and is hence called ruby silver, or light-red silver ore; the latter name is given to distinguish it from the other form of ruby silver, pyrargyrite, which is dark-red or neatly black, and is called dark-red silver ore. Magnificent specimens of proustite are obtained from the mines of Chanarcillo in Chili.

Wiktionary

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

GNU Webster's 1913

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

Etymologies

  1. 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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