Rruff Database's Image Gallery

Mattheddleite: Pb20(SiO4)7(SO4)4Cl4

Comments: Radial aggregates of colorless hexagonal microcrystals of mattheddleite with minor blue-green caledonite.
Location: Dry Smale Gill, Roughton Gill, Caldbeck Fells, Cumbria (Cumberland), England, United Kingdom. Scale: See Image.
© Rruff Database

Metacalciouranoite: (Ca,Na,Ba)U2O7·2(H2O)  
Calciouranoite: (Ca,Ba,Pb)U2O7·5(H2O)

Comments: Cryptocrystalline looking, greasy yellow blotches, of amorphous calciouranoite (probably, in part, dehydrated to matacalciouranoite).
Location: Oktyabr'skoye Mo-U deposit, east Transbaikal region, Russia. Scale: See Image.
© Rruff Database

Miassite: Rh17S15

Comments: Composite image of dark gray metallic polished grains and pale yellow vanadinite embedded in epoxy. Miassite occurs as a small inclusion in the larger isoferrplatinum grain on the inset BSE image.
Location: Yukhtochka placer, Tributary of Aldan River, Yakutia, Russia. Scale: See Image.
© Rruff Database

Nabalamprophyllite: Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2}

Comments: Yellowish brown platy nabalamprophyillite cluster in matrix.
Location: Slyuda (mica) quarry, Kovdor, Kola Peninsula, Russia. Scale: See Image.
© Rruff Database

Nabokoite: Cu++7Te++++O4(SO4)5·KCl

Comments: Brown thin tabular plates, co-type material.
Location: Tolbachik Volcano, Kamchatka, Russia. Scale: See Image.
© Rruff Database

Natrobistantite: (Na,Cs)Bi(Ta,Nb,Sb)4O12

Comments: Bluish-green fragments of natrobistantite embedded in epoxy, co-type material.
Location: Kyoktogai pegmatite field, Altai, Xinjinag Province, China. Scale: See Image.
© Rruff Database

Natroboltwoodite: (H3O)(Na,K)(UO2)SiO4·(H2O)

Comments: Pale yellow, massive, waxy natroboltwoodite.
Location: Alluaiv Mountain, Lovozero, Russia. Scale: See Image.
© Rruff Database

Nickelalumite: (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O)

Comments: Aggregates of blue neckelaluminite spherulites on matrix.
Location: Jomde mine, San Juan County, Utah, USA. Scale: See Image.
© Rruff Database

Nickelskutterudite: (Ni,Co)As3-x  
Dienerite: Ni3As

Comments: Aggregate of silver-gray nickelskutterudite cubes, some tarnished to a brassy color. Dienerite is now considered to be nickelskutterudite.
Location: Hasserode, Harz, Germany. Scale: See Image.
© Rruff Database

Niksergievite: [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6·nH2O

Comments: Pale blue to colorless lamellar fragment of niksergievite.
Location: Tekeli mine, Karatau, Kazakhstan. Scale: See Image.
© Rruff Database

Otavite: CdCO3

Comments: White rhombohedra of otavite.
Location: Tsumeb mine, Tsumeb, Otavi District, Oshikoto, Namibia. Scale: See Image.
© Rruff Database

Paracoquimbite: Fe+++2(SO4)3·9(H2O)

Comments: Light violet aggregate of paracoquimbite crystals.
Location: California Institute of Technology W-19151. Scale: See Image.
© Rruff Database

Parakhinite: Cu++3PbTe++++++O4(OH)6

Comments: Dark emerald-green hexagonal prismatic parakhinite crystals on matrix.
Location: 400 ft. level, Empire mine, Tombstone, Arizona. Scale: See Image.
© Rruff Database

Paramontroseite: VO2

Comments: Black massive, radioactive paramontroseite.
Location: J.J. mine, Buell Canyon District, Montrose County, Colorado, USA. Scale: See Image.
© Rruff Database

Parapierrotite: Tl(Sb,As)5S8

Comments: Black semimetallic fragment of parapierrotite.
Location: Lookout Pass Area, southeast Tooele County, Utah, USA. Scale: See Image.
© Rruff Database

Pararsenolamprite: As

Comments: Dark gray metallic pararsenolamprite.
Location: Mukuno mine, Ouita, Japan. Scale: See Image.
© Rruff Database

Paravinogradovite: (Na,[ ])2(Ti,Fe+++)4(Si2O6)2(Si3AlO10)(OH)4·H2O

Comments: Aggregates of parallel tan colored acicular paravinogradovite crystals associated with zircon.
Location: Kukisvumchorr Mountain, Khibiny Massif, Kola Peninsula, Russia. Scale: See Image.
© Rruff Database

Paulingite-Na: (Na2,K2,Ca,Ba)5Al10Si35O90·45(H2O)

Comments: Druse of colorless dodecahedral paulingite-Na crystals coating vesicles in basalt.
Location: Near Ritter, Grant County, Oregon, USA. Scale: See Image.
© Rruff Database

Pavonite: (Ag,Cu)(Bi,Pb)3S5  
Kitaibelite: Ag10PbBi30S51

Comments: Steel-gray metallic massive pavonite (kitaibelite is discredited as Pb-bearing pavonite).
Location: Near Charcas, San Luis Potosi, Mexico. Scale: See Image.
© Rruff Database

Perryite: (Ni,Fe)8(Si,P)3

Comments: Small microprobe fragment of perryite embedded in epoxy grain mount material.
Location: Mount Egerton meteorite, Gaskoyne River, Western Australia, Australia. Scale: See Image.
© Rruff Database