Tom Loomis's Image Gallery

Nikischerite: NaFe++6Al3(SO4)2(OH)18(H2O)12

Comments: Yellowish green nikischerite on matrix.
Location: Huanuni Mine, Dalence Province, Bolivia. Scale: Crystal size 5 mm.
© Tom Loomis / Dakota Matrix

Nordstromite: Pb3CuBi7(S10Se4)  
Weibullite: Pb6Bi8(S,Se)18

Comments: Fibrous, silvery crystals of nordstromite. Lacking a chemical analysis it is possible that the crystal is weibullite instead.
Location: Falu mine, Falun, Sweden. Scale: Crystal Size 1 mm.
© Tom Loomis / Dakota Matrix

Nullaginite: Ni2(CO3)(OH)2

Comments: Green encrustations of nullaginite on matrix.
Location: Widgiemooltha, Western Australia, Australia. Scale: Sample size: 2 x 2 x 1 cm.
© Tom Loomis / Dakota Matrix

Paakkonenite: Sb2AsS2  
Kermesite: Sb2S2O

Comments: Much of the matrix is the gray metallic paakkonenite with red crystals of kermesite and minute yellow crystals of valentinite.
Location: Cai' ao mine, Danfong Co., Shaanxi Prov., China. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

Parafransoletite: Ca3Be2(PO4)2(PO3,OH)2·4(H2O)  
Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)

Comments: White, crystalline aggregate sprays of parafransoletite on dark reddish brown roscherite with massive, white, sucrosic whitlockite.
Location: Tip Top mine, Custer County, South Dakota, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Paraotwayite: Ni(OH)2-x(SO4,CO3)0.5x x=.5

Comments: Pale green, fibrous, silky, free standing paraotwayite crystals to about 0.25mm.
Location: Vaca Murta meteorite, Taltal, Atacama, Chile. Scale: Crystal size .25 mm.
© Tom Loomis / Dakota Matrix

Parascholzite: CaZn2(PO4)2·2(H2O)  
Ehrleite: Ca2ZnBe(PO4)2(PO3,OH)·4(H2O)

Comments: White to clear, slender, 1-2mm, prismatic crystals of ehrleite associated with massive parascholzite. Type specimen courtesy of Museum of Geology, SD School of Mines.
Location: Tip Top mine, Custer County, South Dakota, USA. Scale: Crystal size 1-2 mm.
© Tom Loomis / Dakota Matrix

Partzite: Cu2Sb2(O,OH)7 (?)

Comments: Light to dark green partzite encrustations with sky-blue chrysocolla and limonite gossan matrix.
Location: Comanche mine, Blind Spring Hill, Benton, Mono Co., California, USA. Scale: 5.5 x 3.5 x 4cm.
© Tom Loomis / Dakota Matrix

Pascoite: Ca3V10O28·17(H2O)

Comments: Bright orange sugary crusts of pascoite across sandstone matrix.
Location: Black Stone Incline, Thompson dist., Grand Co., Utah, USA. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

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

Comments: Crystals of metallic pearceite to 0.75 mm scattered in vug.
Location: Sarbaiskoe, Kazakhstan. Scale: 4x3x3 cm.
© Tom Loomis / Dakota Matrix

Penfieldite: Pb2Cl3(OH)

Comments: White to clear or light blue, doubly terminated, striated penfieldite crystals from 0.5 to 2mm associated with boleite as micro coatings.
Location: Margarita mine, Sierra Gorda, Chile. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Pentagonite: Ca(VO)Si4O10·4(H2O)

Comments: Blue, crystalline aggregate of pentagonite on zeolite.
Location: Wagholi quarries, Poona, India. Scale: Grain size 1.2 cm.
© Tom Loomis / Dakota Matrix

Perraultite: (Na,Ca)2(Ba,K)2(Mn++,Fe++)8(Ti,Nb)4Si8O32(OH,F,O)6

Comments: Dark red prismatic crystal of perraultite to 1mm in matrix.
Location: Mariupol massif, Azov Sea Region, Ukraine. Scale: Picture size 3 mm.
© Tom Loomis / Dakota Matrix

Petersite-(Y): (Y,Ce,Nd,Ca)Cu6(PO4)3(OH)6·3(H2O)

Comments: Fine, light green, acicular crystals of petersite-(Y) to less than 0.2mm occupying an area of about 1mm on dark green malachite.
Location: Laurel Hill, Hudson Co., New Jersey, USA. Scale: Picture size .5 cm.
© Tom Loomis / Dakota Matrix

Phoenicochroite: Pb2(CrO4)O  
Hemihedrite: Pb10Zn(CrO4)6(SiO4)2F2

Comments: Yellow hemihedrite crystals to 1 mm within pockets of dark red phoenicochroite crystalline aggregates on matrix.
Location: Pack Rat claim, Maricopa Co., Arizona, USA. Scale: Picture size 1.5 cm.
© Tom Loomis / Dakota Matrix

Phosphohedyphane: Ca2Pb3(PO4)3Cl

Comments: Clear, prismatic phosphohedyphane crystal on matrix.
Location: Argentena mine, Goodsprings, Clark Co., Nevada, USA. Scale: Crystal size 0.5mm.
© Tom Loomis / Dakota Matrix

Phurcalite: Ca2(UO2)3O2(PO4)2·7(H2O)

Comments: Bright canary yellow acicular phurcalite crystals to about 0.25mm. Seems to have overgrown perhaps torbernite and individual groups are to 1mm.
Location: El Azul mine, Los Azules district, Copiapo Province, Atacama, Chile. Scale: Picture Size 5 mm.
© Tom Loomis / Dakota Matrix

Picropharmacolite: Ca4Mg(AsO3OH)2(AsO4)2·11(H2O)

Comments: Snow white acicular, radial spray of picropharmacolite with pink sainfeldite.
Location: Wilhelm Mine, Richelsdorf District, Hesse, Germany. Scale: Cluster size 6 mm.
© Tom Loomis / Dakota Matrix

Pierrotite: Tl2Sb6As4S16

Comments: Orange-red micro crystals of pierrotite to 0.2 mm..
Location: Jas Roux, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France. Scale: Sample Size 1x2 cm.
© Tom Loomis / Dakota Matrix

Pinalite: Pb3(WO4)OCl2

Comments: Yellow needles of pinalite from 0.2 to 0.5mm in rose quartz and blue caledonite.
Location: Tiger, Pinal County, Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix