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 (pī-rär′jə-rīt′, pĭ-)
A deep red to black silver ore with composition Ag3SbS3.

[German Pyrargyrit : Greek puro-, pyro- + Greek arguros, silver; see argent.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) a dark red to black mineral consisting of silver antimony sulphide in hexagonal crystalline form: occurs in silver veins and is an important ore of silver. Formula: Ag3SbS3
[C19: from German Pyrargyrit, from pyro- + Greek arguros silver]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(paɪˈrɑr dʒəˌraɪt)

a blackish mineral, silver antimony sulfide, Ag3SbS3, deep red when transparent: an ore of silver.
[1840–50; pyr- + Greek árgyr(on) silver + -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The assemblage of sulfide minerals includes arsenopyrite, pyrite, pyrrhotite, sphalerite, chalcopyrite, and galena, along with minor tetrahedrite, pyrargyrite, and argentite (Figures 3(e)-3(h)).
The deposits contain the important silver ore minerals, argentite and pyrargyrite, as well as argentiferous galena and antimonial silver minerals, the latter in their deeper portions.
Similar pearceite specimens have trickled out before from the huge silver mine, but these new pieces display very brilliant rosettes, some with attachments of bright red, pinwheel-shaped aggregates of what is probably proustite (Luis's labels call it pyrargyrite, but proustite seems more likely, as the Uchucchacua orebody is arsenic-heavy, and the association here is with As-rich pearceite, not Sb-rich polybasite).
Another less important Ag mineral is pyrargyrite (called 'ruby silver' by prospectors), which was only abundant in the Silver King, Husky, Elsa and, particularly, the Lucky Queen mines.
Its ore was chiefly pyrargyrite, called "rosicler" by the Spaniards.
In the first decade of the 20th century, the Las Chispas mine near Arizpe in Sonora produced some of Mexico's largest and best specimens of polybasite crystals, large clusters of "poker chip" stephanite crystals, fine acanthite crystal clusters and a few very fine pyrargyrite specimens.
Since the turn of the century, fantastic specimens of wulfenite, calcite, amethyst, pyrargyrite, acanthite, galena, gypsum--the list goes on and on--have made their way to collections across the globe.