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Poubaite: PbBi2Se2(Te,S)2
Comments: Gray granular crystalline poubaite in white calcite. Location: Oldrichov, near Tachov, western Bohemia, Zapadocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Povondraite: (Na,K)(Fe+++,Fe++)3(Fe,Mg,Al)6(BO3)3Si6O18(OH)4
Comments: Deep greenish black povondraite crystals. Location: Malacacheta, Minas Gerais, Brazil. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Poyarkovite: Hg3ClO
Comments: Dark greenish black thin poyarkovite film on white chert. Location: Elena, Durango, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Preiswerkite: NaMg2Al3Si2O10(OH)2
Comments: Pale green fine grained preiswerkite masses in dark amphibolite rock. Location: Geisspfad, Binnental, Valias, Switzerland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Preobrazhenskite: Mg3B11O15(OH)9
Comments: Crudely formed white to tan translucent preobrazhenskite crystal on yellow crystalline massive material. Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Priceite: Ca2B5O7(OH)5·H2O Ginorite: Ca2B14O23·8(H2O)
Comments: Clear platy crystalline coatings of ginorite on rock with white priceite. Location: Corkscrew Canyon, Death Valley, Inyo County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Priceite: Ca2B5O7(OH)5·H2O
Comments: Botryoidal priceite aggregate. Location: Lone Randi Quarry, Curry County, Oregon, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Prosopite: CaAL2(F,OH)8
Comments: Pale violet prosopite microcrystals. Location: Ivigtut, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pseudocotunnite: K2PbCl4 (?)
Comments: Bright white botryoidal pseudocotunnite coatings. Location: Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Psilomelane: (Ba,H2O)2Mn5O10
Comments: Banded massive psilomelane. Location: Compton, Virginia, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pumpellyite-(Fe+++): Ca2Fe+++Al2(SiO4)(Si2O7)(OH,O)2·(H2O)
Comments: Crystals of pumpellyite-(Fe+++), to 0.1 mm. Location: Braen Stone Industry Quarry, Haledon, Passaic Co., New Jersey, USA. Scale: Crystal Length 0.1 mm. © Jeff Weissman / Photographic Guide to Mineral Species
Pyrochlore: (Na,Ca)2Nb2O6(OH,F) Perrierite-(Ce): (Ce,La,Ca)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22 Zircon: ZrSiO4 Loparite-(Ce): (Ce,Na,Ca)2(Ti,Nb)2O6
Comments: Reddish black perrierite crystal, with orange-brown pyrochlore crystal, yellow-brown zircon, and grayish-black loparite. Location: Buer, Bjorkedalen, Langesundfjord, Telemark, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pyrolusite: MnO2
Comments: Steel-gray metallic prismatic pyrolusite crystals. Location: Hori Blatna, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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
Qandilite: (Mg,Fe++)2(Ti,Fe+++,Al)O4
Comments: Small black grains of qandilite in a forsterite skarn rock matrix. Location: Dupezeh Mt., Hero, Qala-Diz (Qala-Dizeh; Qala-Diza), Iraq. Scale: Picture Size 0.5 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Queitite: Pb4Zn2(SiO4)(Si2O7)(SO4)
Comments: White earthy queitite masses on quartz. Location: Tombstone, Cochise County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Quenstedtite: Fe+++2(SO4)3·10(H2O)
Comments: White crystalline quenstedtite crust. Location: Richelsdorf, Hessen, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Raadeite: Mg7(PO4)2(OH)8 Heneuite: CaMg5(PO4)3(CO3)(OH)
Comments: Translucent aqua colored greasy heneuite grain, surrounded by beige rim of raadeite, with dark blue phosphoellenbergerite inclusion (near top of heneuite), in quartz apatite rock. Location: Tingelstadt Iron Mine, Modum, Buskerud, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Raguinite: TlFeS2
Comments: Murky gray-brown fine grained raguinite mass, intermixed with pyrite. Location: Allchar, Macedonia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species