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Pinnoite: MgB2O4·3(H2O) Inderite: MgB3O3(OH)5·5(H2O)
Comments: Pale green translucent crystalline pinnoite on chalky white inderite. Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pintadoite: Ca2V2O7·9(H2O)
Comments: Dark green to lighter green pintadoite coatings on sandstone. Location: Deremo-Snyder Mine, San Miguel County, Colorado, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pirssonite: Na2Ca(CO3)2·2(H2O)
Comments: Almost transparent platy pirssonite crystal. Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Plagioclase: (Na,Ca)(Si,Al)4O8
Comments: Plagioclase, variety kenyite, crystals in volcanic rock. Location: Kirinyaga (Mount Kenya), Central Province, Kenya. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Plagionite: Pb5Sb8S17
Comments: Silvery metallic crystalline plagionite with brassy chalcopyrite. Location: Rocker Creek, Jefferson County, Montana, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Platynite: (Bi,Pb)3(Se,S)4 Paraguanajuatite: Bi2(Se,S)3
Comments: Bright metallic gray platy crystalline platynite, with dull black paraguanajuatite. Location: Falun, Kopparberg, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Plombierite: Ca5H2Si6O18·6H2O
Comments: Whitish chalky massive, somewhat fibrous plombierite, in vesuvianite. Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Plumbopyrochlore: (Pb,Y,U,Ca)2-xNb2O6(OH) Columbite-(Fe): Fe++Nb2O6
Comments: Brown plumbopyrochlore crystal with dark brown ferrocolumbite (columbite-(Fe)). Location: Holdazan, Buregteg, Mongolia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Plumbotsumite: Pb5Si4O8(OH)10
Comments: Translucent plumbotsumite microcrystals. Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Poitevinite: (Cu,Fe++,Zn)SO4·(H2O)
Comments: Pale brown powdery poitevinite mass with pale blue chalcanthite. Location: Bonaparte River, Kamloops District, British Columbia, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species