Definition of pyrargyrite
: a silver antimony sulfide Ag3SbS3 that is isomorphous with proustite, occurs in rhombohedral crystals or massive, and has a dark-red or black color with a metallic adamantine luster —called also dark red silver ore, ruby silver
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Origin and Etymology of pyrargyrite
German pyrargyrit, from pyr- + argyr- + -it -ite
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