Search Mineralpedia – A Mineral Photo Database and Identification Guide
Named after the Greek pyr, for “fire,” and argyros, for “silver,” in reference to the color and silver in the composition. AN important silver ore, Pyrargyrite can be found in hydrothermal veins both as a primary and secondary mineral and can also be found in oxidized silver deposits. There are hundreds of localities, a few include Germany, Spain, the Czech Republic, the United States, Canada, Bolivia, Mexico, Peru, Chile, and Australia.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/pyrargyrite.pdf