Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Plagionite: Pb5Sb8S17
Comments: Lead-gray crystals (to 2mm) of plagionite with a bluish tarnish on vuggy white calcite matrix. Location: Wolfsberg, Harz, Germany. Scale: 3.5 x 2.5 x 1.5cm. © Tom Loomis / Dakota Matrix
Plimerite: ZnFe+++4(PO4)3(OH)5
Comments: Light olive green to dark green hemispheres and crusts of plimerite. From Author's study material. Location: Broken Hill, Yancowinna Co, New South Wales, Australia. Scale: Size: Miniature. © Tom Loomis / Dakota Matrix
Plumbophyllite: Pb2Si4O10·H2O
Comments: Light blue, compact, radial, thin platy crystals of plumbophyllite in matrix. Location: Blue Bell Claims, San Bernardino Co., California, USA. Scale: Specimen size 3 x 2.5 x 2 cm. © Tom Loomis / Dakota Matrix
Potassiccarpholite: (K,Na,[ ])(Li,Mn++)2Al)4Si4O12(OH)4(F,OH)4
Comments: Tan prismatic crystal sprays of potassic-carpholite to about 2mm in matrix. Location: Sawtooth Batholith, near Centerville, Boise Co., Idaho, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Pumpellyite-(Mg): Ca2MgAl2(SiO4)(Si2O7)(OH)2·(H2O)
Comments: Greenish, flattened, prismatic crystals of pumpellyite-(Mg) ? to 3mm. Location: Deere Island, Novato, Marin Co., California, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Pyroaurite: Mg6Fe+++2(CO3)(OH)16·4(H2O)
Comments: Green, hexagonal plates of pyroaurite in quartz. Location: Varmland, Sweden. Scale: Crystal size 1 mm. © Tom Loomis / Dakota Matrix
Comments: Golden yellow platy crystals of pyroaurite to 1mm on matrix. Location: Langban mine, Varmland, Sweden. Scale: Picture size 1 cm. © Tom Loomis / Dakota Matrix
Pyrosmalite-(Mn): (Mn,Fe++)8Si6O15(OH,Cl)10
Comments: Hexagonal, light brown crystals of manganpyrosmalite. Location: Nordmark, Filipstad, Varmland, Sweden. Scale: Crystal size 1.5 mm. © Tom Loomis / Dakota Matrix
Pyrostilpnite: Ag3SbS3
Comments: Deep bright-red, acicular crystals of pyrostilpnite to 1mm in vuggy sulfide matrix. Location: Cerro Rico, Potosi City, Potosi Dept., Bolivia. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Quenselite: PbMn+++O2(OH)
Comments: Jet black tabular crystals of quenselite, some striated on matrix. Location: Langban, Varmland, Sweden. Scale: Crystal size 1.75mm. © Tom Loomis / Dakota Matrix
Rabbittite: Ca3Mg3(UO2)2(CO3)6(OH)4·18(H2O)
Comments: Fine, yellow, acicular sprays of rabbittite to about 1mm on matrix. Location: Hideout mine, San Juan Co., Utah, USA. Scale: 20x10x4mm. © Tom Loomis / Dakota Matrix
Rasvumite: KFe2S3
Comments: Reddish brown micro crystals of rasvumite in vugs to about 0.75mm. Location: Kirovskiy mine, Khibina massif, Kola Peninsula, Russia. Scale: 3.5 x 2.5 x 2.5cm. © Tom Loomis / Dakota Matrix
Reddingite: Mn++3(PO4)2·3(H2O)
Comments: Golden brown to brown, highly lustrous, pseudo-octahedral crystals of reddinite. Location: Cigana mine, Galileia, Minas Gerais, Brazil. Scale: Crystal size 0.5 mm. © Tom Loomis / Dakota Matrix
Reppiaite: Mn++5[(V,As)O4]2(OH)4
Comments: Vitreous orange crystals of reppiaite embedded in matrix. Location: Gambatesa mine, Genova, Ligurai, Italy. Scale: Crystal size 0.5mm. © Tom Loomis / Dakota Matrix
Rhodonite: (Mn++,Fe++,Mg,Ca)SiO3
Comments: Deep red blocky prismatic crystals of rhodonite to 3cm. Location: Broken Hill mine, New South Wales, Australia. Scale: 6.5 x 5 x 4cm. © Tom Loomis / Dakota Matrix
Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5 Lindbergite: Mn(C2O4)·2(H2O)
Comments: Rare organic mineral - lindbergite (Mn dihydrate oxalate) in white patches on rockbridgeite matrix. Location: Boca Rica mine, Sapucaia do Norte, Gilileia, Minas Gerais, Brazil. Scale: Spot size 1 mm. © Tom Loomis / Dakota Matrix
Roscherite: Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O) Parafransoletite: Ca3Be2(PO4)2(PO3,OH)2·4(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
Ruizite: CaMn+++Si2O6(OH)·2(H2O)
Comments: Deep reddish brown crystals of ruizite as radial, acicular sprays to 0.1mm. Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Sahlinite: Pb14(AsO4)2O9Cl4
Comments: Light lemon yellow sahlinite on dark hausmannite and white dolomite matrix. Location: Langban mine, Filipstad, Värmland , Sweden. Scale: Crystal size 1.5cm. © Tom Loomis / Dakota Matrix
Sanbornite: BaSi2O5 Bazirite: BaZrSi3O9
Comments: Clear glassy minute grains of bazinite to 1mm through out matrix of milky-white sanbornite. The bazirite fluoresces light blue. Location: Snow Cap mine, Rush Creek, Fresno Co., California, USA. Scale: 6.5 x 3 x 2.5cm. © Tom Loomis / Dakota Matrix