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Potassic-ferritaramite: Ferritaramite: Na(CaNa)(Fe++,Mg)3Fe+++2[Si6Al2O22](OH)2
Comments: Lightly to moderately etched, blocky, jet black ferritaramite (potassic-ferritaramite is a not approved mineral name). Location: Niaslo, Basha Valley, Baltistan, Pakistan. Scale: 5 x 1.5 x 0.3 cm. © John Veevaert
Potassic-fluororichterite: (K,Na)(CaNa)Mg5[Si8O22]F2
Comments: Transparent, prismatic crystal of potassic-fluororichterite. Location: Koksha Valley, Badakhshan Province, Afghanistan. Scale: Specimen Size 2.7 x .6 x .2 cm. © Rob Lavinsky
Potassic-magnesiohastingsite: (K,Na)Ca2(Mg,Fe++,Fe+++,Al)5(Si,Al)8O22(OH,Cl)2
Comments: Black crystalling aggregate of potassic-magnesiohastingsite. Location: Lake Bolshoy Ishkul, Ilmeny Mts, Chelyabinsk District, Russia. Scale: Specimen size: 12x5 mm. © Sergey Vasiliev / Systematic Mineralogy
Potassiccarpholite: (K,Na,[ ])(Li,Mn++)2Al)4Si4O12(OH)4(F,OH)4
Comments: Tan prismatic crystal sprays of potassic-carpholite to about 2mm in matrix. Location: Sawtooth Batholith, near Centerville, Boise Co., Idaho, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Potassicferrisadanagaite: (K,Na)Ca2(Fe++,Mg)2(Fe+++,Al)2[Si5Al3O22](OH,F,O)2
Comments: Small crystalline fragments of potassicferrisadanagaite. Location: Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia. Scale: FOV 0.08 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Potassicleakeite: KNa2Mg2Fe+++2LiSi8O22(OH)2 Watatsumiite: Na2KMn2LiV2Si8O24
Comments: Yellow green prismatic crystal of watatsumiite terminated by pyramidal faces associated with reddish brown potassicleakeite and clear quartz (JMPS, v 98, p 149). Location: Tanohata mine, Iwate Prefecture, Japan. Scale: See Image. © JMPS
Potassicpargasite: (K,Na)Ca2(Mg,Fe++)5Si8O22(OH,F)2
Comments: Brownish-black potassicpargasite crystal in calcite (repaired). Location: Simonby, Pargas, Turku ja Pori, Finland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Potassicrichterite: (K,Na)(CaNa)2Mg5[Si8O22](OH,F)2
Comments: Lapidary sample of 'Dianite' consisting of blue nepherite with fiberous strontian (~3.5 % SrO) potassicrichterite. White nodule is quartz-microcline surrounded by dark green potassic-magnesio-arfvedsonite. Location: Kedrovyi alkaline Massif, Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia. Scale: Specimen Size 8.5x4x1 cm. © Pavel M. Kartashov
Potassicsadanagaite: (K,Na)Ca2[Fe++3(Al,Fe+++)2][Si5Al3O22](OH)2
Comments: Dark greenish black crystalline potassicsadanagaite fragments. Location: Ilmeny Mountains, Chelyabinsk District, Southern Urals, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Potosiite: Pb6Sn2FeSb2S14 Franckeite: (Pb,Sn)6Fe++Sn2Sb2S14
Comments: Visually indistinguishable metallic potosiite/franckeite crystals to 6 mm.. Location: San Jose mine, Oruro City, Oruro Department, Bolivia. Scale: Crystal size 6 mm. © Rob Lavinsky
Pottsite: PbBiH(VO4)2·2(H2O)
Comments: Sub-mm, bright yellow to orange pottsite crystals form coating on one side of specimen. Location: Linka Mine, Potts, Lander County, Nevada, USA. Scale: 3.5 x 4 cm. © John Veevaert
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
Poudretteite: KNa2B3Si12O30
Comments: Pale pink gem fragment of poudretteite. Location: Pyant-gyi mine, near Pein-pyit, Mogok, Sagaing Region, Mandalay Division, Burma. Scale: See Image. © Rruff Database
Poughite: Fe+++2(TeO3)2(SO4)·3(H2O)
Comments: Yellow coatings of poughite on matrix. Location: Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag
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
Powellite: CaMoO4
Comments: Sharp, thumbnail-sized crystal group of yellowish brown lustrous powellite crystals, the largest measuring 15 x 18 mm in size. Location: Pandulane quarry, Nasik district, Maharashtra, India. Scale: 20 x 25 x 16 mm. © Dan Weinrich
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
Prehnite: Ca2Al2Si3O10(OH)2
Comments: Very lustrous and brilliant prehnite. Location: Deep Sahara, Morocco: Djbel Melh, Bou-Arfa. Scale: 9 x 6.5 cm. © Fabre Minerals
Preisingerite: Bi3(AsO4)2O(OH)
Comments: Olive-greenish crystals of preisingerite on quartz. Location: Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
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