Diederik Visser's Image Gallery

Nagelschmidtite: Ca7(SiO4)3(PO4)2

Comments: Upper - Transmitted light thin sections showing honey-brown nagelschmidtite. Lower - reflected light polished section showing nagelschmidtite (Nag), rankinite (Ran), Ti-rich androdite (Andr).
Location: Andradite-rich pegmatoid rock, Haturim Basin, Negev Desert, Israel. Scale: See Images.
© Diederik Visser

Natisite: Na2(TiO)SiO4

Comments: Yellow-greenish crystals of natisite in matrix.
Location: Mt. Karnasurt, Lovozero, Kola, Russia. Scale: Picture size 1 cm.
© Diederik Visser

Natrotantite: Na2Ta4O11

Comments: BSE image of ferrotapiolite (1), natrotantite (2) and simsonite (3).
Location: Alto Cajazeiras, south of Junro do Serido, Paraibo, Brazil. Scale: See Image.
© Diederik Visser

Neighborite: NaMgF3

Comments: Dark red-brown neighborite crystals in matrix.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Crystal Size 1-2 mm.
© Diederik Visser

Nepskoeite: Mg4Cl(OH)7·6(H2O)

Comments: Cream-colored nodules of nepskoeite recovered from potash ore preserved in glass tube 1.5 cm long.
Location: Nepskoe Deposit, Irkutsk District, Siberia, Russia. Scale: Nodule Size 0.1 mm.
© Diederik Visser

Organovaite-Mn: K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O)

Comments: Crude pink organovaite-Mn pseudomorphs after vuonnemite.
Location: Mt. Karnasurt, Lovozero, Kola Peninsula, Russia. Scale: Specimen Size 1.5x2.5 cm.
© Diederik Visser

Organovaite-Zn: K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6(H2O)

Comments: Crude pinkish-brown organovaite-Zn crystals in matrix.
Location: Mt. Karnasurt, Lovozero, Kola Peninsula, Russia. Scale: Specimen Size 1x2.5 cm.
© Diederik Visser

Ovamboite: Cu20(Fe,Cu,Zn)6W2Ge6S32

Comments: BSE image of ovamboite (ov), germanite (germ) and chalcocite (cc).
Location: Tsumeb deposit, Namibia. Scale: See Image.
© Diederik Visser

Parasibirskite: Ca2B2O5·(H2O)

Comments: White massive parasibirskite.
Location: Fuka, Bicchu-cho, Kawakami-gun, Okayama-ken, Japan. Scale: Specimen size 1.5 x 2 cm.
© Diederik Visser

Paratsepinite-Na: (Na,Sr,K,Ca)7(Ti,Nb)8[Si4O12]4(O,OH)8·n(H2O) n ~ 8

Comments: Colorless paratsepinite-Na crystals with associated red-brown labuntsovite.
Location: Mt. Khibinpakhchorr, Chibiny, Kola, Russia. Scale: Picture size 3 x 5 mm.
© Diederik Visser

Parwanite: (Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7·30H2O

Comments: Translucent to white parwanite globules on montmorillonite matrix.
Location: Parwan Lava Caves, Bacchus Marsh Victoria, Australia. Scale: Picture Size 2 x 3 mm.
© Diederik Visser

Pauflerite: VO(SO4)

Comments: SEM image of small fragments of pauflerite.
Location: Tolbackik Volcano, Great Tobachik eruption (1984), Second Cone, Kanchatka, Russia. Scale: See Image.
© Diederik Visser

Paulingite-Ca: (Ca,K,Na,Ba)5[Al10Si35O84]·34(H2O)

Comments: Small cubes of druzy paulingite-Ca on basalt.
Location: Three Mile Creek, Ritter, Grant County, Oregon, USA. Scale: Specimen Size 2x2.5 cm.
© Diederik Visser

Pecoraite: Ni3Si2O5(OH)4

Comments: Dark green massive pecoraite in matrix.
Location: Nullagin, Western Australia, Australia. Scale: Specimen Size 2x2.5 cm.
© Diederik Visser

Pekoite: PbCuBi11(S,Se)18

Comments: Gray-metallic pekoite disseminated in quartz with chalcopyrite.
Location: Falungruva, Dalarna, Sweden. Scale: Not given.
© Diederik Visser

Phillipsite-Ca: (Ca,K,Na)1-2(Si,Al)8O16·6(H2O)

Comments: White, stout-prismatic phillipsite-Ca crystals in vugs in basalt.
Location: Three Mile Creek, Ritter, Grant County, Oregon, USA. Scale: Specimen Size 2x2 cm.
© Diederik Visser

Piypite: K2Cu2(SO4)2O

Comments: Green, acicular piypite crystals on matrix.
Location: Main Fracture Eruption (1975-1976) Tolbachik Volcano, Kamchatka, Russia. Scale: Picture Size 1 cm.
© Diederik Visser

Plumosite: Pb2Sb2S5

Comments: Gray metallic needles of plumosite in brown siderite matrix.
Location: Pribram, Bohemia, Czech Republic. Scale: Not Given.
© Diederik Visser

Podlesnoite: BaCa2(CO3)2F2

Comments: Tabular, prismatic podlesnooite crystals up to 2 mm in radiating groups and clusters with double terminations.
Location: Kirovskii Mine, Mt. Kukisvumchorr, Chibiny, Kola Peninsula, Russia. Scale: Crystal size 1 mm.
© Diederik Visser

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