We don't have synonyms for pyrargyrite yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are cerargyrite and kerargyrite.
(n) :
(mineralogy) A sulfosalt mineral used as a silver ore; it is dark red or black in color with a metallic adamantine luster, a sulfide of antimony and silver, Ag₃SbS₃, and occurs in rhombohedral crystals.
(n) :
(mineralogy) A sulfosalt mineral used as a silver ore; it is dark red or black in color with a metallic adamantine luster, a sulfide of antimony and silver, Ag₃SbS₃, and occurs in rhombohedral crystals.