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Pyrostilpnite: Ag3SbS3
Comments: Deep bright-red, acicular crystals of pyrostilpnite to 1mm in vuggy sulfide matrix. Location: Cerro Rico, Potosi City, Potosi Dept., Bolivia. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Comments: Reddish brown, crystalline aggregate of pyrostilpnite on matrix. Location: St. Audreasberg, Hartz, Lower Saxony, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Pyroxferroite: (Fe++,Mn)7[Si7O21]
Comments: Brown crystalline pyroxferroite cleavage. Location: Ohnari Mine, Mineyama-cho, Naka-Gun, Kyoto, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pyroxmangite: (Mn,Fe++)SiO3
Comments: Pinkish red nearly opaque crystalline pyroxmangite. Location: Shidara, Kitashidara-Gun, Aichi, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pyrrhotite: Fe(1-x)S (x=0-0.17)
Comments: Lustrous sharp crystals of pyrrhotite to 3.5 cm in size with minor sphalerite and chalcopyrite. Location: Nikolaevskiy mine, Dal'negors, Primorskiy Kray, Russia. Scale: 4 x 5 x 5.5 cm. © Dan Weinrich