Mineral Specimen Images (P)

Pokrovskite: Mg2(CO3)(OH)2·0.5(H2O)  
Hydromagnesite: Mg5(CO3)4(OH)2·4(H2O)

Comments: Tan spherical pokrovskite on serpentinite rock with white hydromagnesite sprays.
Location: KCA Quarry, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Polarite: Pd(Bi,Pb)  
Pasavaite: Pd3Pb2Te2

Comments: BSE image of pasavaite (pas) embedded in polarite (po) in association with sperrylite (sp), Pd-Pb-Bi-Te and Au-Ag phases. (CanMin, v47:53).
Location: Talnakh deposit, Noril’sk-Talnakh Ni-Cu camp, Taimyr Autonomous District, Russia. Scale: See Image.
© Canadian Mineralogist

Poldervaartite: (Ca,Mn++)2SiO3(OH)2

Comments: Moderate reddish tint to yellowish poldervaartite crystalline druze on matrix.
Location: N'chwaning II mine, section 5 south, stope 46-47 roof, Kuruman, Kalahari desert, South Africa. Scale: 6 x 3.5 x 4 cm.
© Fabre Minerals

Poldervaartite: (Ca,Mn++)2SiO3(OH)2  
Bultfonteinite: Ca2SiO2(OH,F)4

Comments: Bow-tie clusters of white, acicular bultfonteinite and blocky, beige-colored poldervaartite on matrix.
Location: N'Chwaning mine, South Africa. Scale: picture size 4 cm.
© John Veevaert

Polhemusite: (Zn,Hg)S

Comments: B&W polished section (PPL) image (green filter) of aggregates of polhemusite (P) in stibnite (S) with associated cinnabar (C) and quartz (Q). (AmMin, v63:1153).
Location: Mercury-bearing antimony ore from the B and B deposit, Big Creek district, Valley County, Idaho. Scale: Scale Bar 0.5 mm.
© American Mineralogist

Polkanovite: Rh12As7

Comments: BSE image of isoferroplatinum (IFP) and polkanovite (PLK) inclusions in native osmium (Os, IR, Ru).
Location: Heavy minera concentrates, Miass River, Ural, Russia. Scale: See Image.
© Diederik Visser

Pollucite: (Cs,Na)2Al2Si4O12·(H2O)

Comments: Isometric crystal of pollucite with clear quartz and sucrosic albite matrix.
Location: Shigar mine, Dossu, Skardu, Pakistan. Scale: 14.6x10x11.5 cm.
© Fabre Minerals

Polyakovite-(Ce): (Ce,La,Nd,Pr,Ca)4(Mg,Fe++)(Cr,Fe+++)2(Ti,Nb)2Si4O22

Comments: Black, pitchy, polyakovite-(Ce) crystal showing conchoidal surfaces so typical for this mineral. Green fluororichterite overgrowth is just visible. Measured radioactivity is 146µR/h.
Location: Pit No. 97 (N97 Mine), Ilmen Natural Reserve, Ilmen Mts, Chelyabinsk Oblast', Southern Urals, Urals Region, Russia. Scale: Specimen size is 4.5x3x2.5 cm.
© Pavel M. Kartashov

Polybasite: [Ag9CuS4] [(Ag,Cu)6(Sb,As)2S7]

Comments: Lustrous, metallic steel-gray rosette of polybasite crystals.
Location: Guanajuato, Mexico. Scale: 18 x 16 x 8 mm.
© Dan Weinrich

Polycrase-(Y): (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6

Comments: Large, black, blocky polycrase-(Y) crystal.
Location: Hidra, Vest-Agder, Norway. Scale: Crystal size 0.8 X 2.0 cm.
© John Veevaert

Polydymite: NiNi2S4

Comments: Octahedral crystals of polydymite on matrix.
Location: Grüneau Mine (Grüne Au Mine; Grünau Mine), Schutzbach, Betzdorf, Siegen District (W), Rhineland-Palatinate, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Polyhalite: K2Ca2Mg(SO4)4·2(H2O)

Comments: White crystals of polyhalite in matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Polylithionite: KLi2AlSi4O10(F,OH)2

Comments: Rosette of polylithionite crystals.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: 2.5 x 2.3 cm.
© John Veevaert

Polylithionite: KLi2AlSi4O10(F,OH)2  
Shibkovite: K(Ca,Mn,Na)2(K2-x,[ ]x)2ZnSi12O30 (x~0.8)

Comments: Clear crystalline shibkovite aggregates with peach colored translucent polylithionite.
Location: Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ponomarevite: K4Cu++4OCl10

Comments: Orange ponomarevite. The sample stored in a closed vial. The photo was made through the vial.
Location: Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Poppiite: Ca2(V+++,Fe+++,Mg)(V+++,Al)2(Si,Al)3(O,OH)14

Comments: SEM micrograph of a poppiite crystal fragment (AmMin v91. p585).
Location: Gambatesa mine, near the village of Reppia (Val Graveglia, Northern Apennines, Italy). Scale: See Image.
© American Mineralogist

Portlandite: Ca(OH)2

Comments: Cleaved mass of white portlandite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 4 x 1.5 cm.
© John Veevaert

Posnjakite: Cu4(SO4)(OH)6·(H2O)

Comments: Waxy blue aggregates of posnjakite.
Location: Ecton mine, Audubon, Montgomery County, Pennsylvania, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Potarite: PdHg

Comments: BSE probe image showing a composite grain of potarite (PdHg), and a PtNiFeCu alloy in an intertitial site and filling a fracture in a chromite grain (Chr).
Location: Southern Quebec Ophiolite Belt, Thetford Mines ophiolitic complex, Canada. Scale: See Image.
© National Resouces of Canada

Potarite: PdHg

Comments: Potarite grains in a geletin capsule.
Location: Potaro River, Kangaruma District, Guyana. Scale: Sample Size 4.1 x 2.2 x 1.9 cm.
© Rob Lavinsky