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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
Protomangano-ferro-anthophyllite: (Mn++,Fe++)2(Fe++,Mg)5(Si4O11)2(OH)2
Comments: Light brown, silky protomangano-ferro-anthophyllite crystals on brown fayalite with grunerite. Location: Suishouyama Pegmatite, Lizaka, Kawamatacho, Fukushima, Japan. Scale: Specimen Size 3x3 cm. © Diederik Visser
Rastsvetaevite: Na27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2
Comments: Pinkish rastsvetaevite specimen in 1 cm plastic box. Location: Mt. Rasvumchorr, Chibiny, Kola, Russia. Scale: See Fingers. © Diederik Visser
Redgillite: Cu6(OH)10(SO4)·H2O
Comments: Light green acicular microcrystals of redgillite with unidentified blue Cu sulphate on matrix. Location: Grube Schone Aussicht, Siegerland, Germany. Scale: Picture size 2 mm. © Diederik Visser
Revdite: Na2Si2O5·5(H2O)
Comments: Transparent crystal fragment of revdite photographed through a capsule. Location: Mt. Alluaiv, Lovozero, Kola, Russia. Scale: Not Given. © Diederik Visser
Reyerite: (Na,K)4Ca14Si22Al2O58(OH)8·6(H2O)
Comments: Micaceous white plates of reyerite in cavity in basalt. Location: Drynoch near Carbost, Isle of Skye, Scotland. Scale: Specimen Size 1.5x2 cm. © Diederik Visser