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Definition of Proustite
1. n. A sulphide of arsenic and silver of a beautiful cochineal-red color, occurring in rhombohedral crystals, and also massive; ruby silver.
Definition of Proustite
1. Noun. (minerology) A mineral, Ag3AsS3, often found with pyragyrite in silver veins. ¹
¹ Source: wiktionary.com
Definition of Proustite
1. [n -S]