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Protoanthophyllite: (Mg,Fe)7Si8O22(OH)2
Comments: Drill core showing white acicular crystalline aggregates of protoanthophyllite in matrix with a close up image on the right.. Location: Drill-core sample from the waste dump of the abandoned Takase chromite mine, Okayama Prefecture, Japan. Scale: Core size 3 cm. © American Mineralogist
Protoferro-anthophyllite: (Fe++,Mn++)2(Fe++,Mg)5(Si4O11)2(OH)2
Comments: Sprays of brown-green prismatic protoferro-anthophyllite crystals. Location: Nyppio mine, near Utsonomiya, Japan. Scale: See Image. © Rruff Database
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
Proudite: Cu1.9Ag0.1Pb15.6Bi20.4Sb0.1S32.4Se14.5
Comments: BSE image of proudite aggregates from Tennant Creek, Australia. Pr = proudite, light grey: J = junoite, G = gangue and holes. (CanMin v47:25). Location: Juno mine, Tennant Creek, Northern Territory, Australia. Scale: See Image. © Canadian Mineralogist
Proustite: Ag3AsS3
Comments: Crystal group of gemmy, red proustite. Smithsonian collection. Location: Dolores I Mine, Chañarcillo, Atacáma Province, Chile. Scale: Specimen Size 6x8 cm. © Dave Barthelmy
Pseudoboleite: Pb5Cu4Cl10(OH)8·2(H2O)
Comments: Blue crystal of pseudoboleite. Location: Curuglu Mine, Santa Rosalía (El Boleó), Boleó District, Mun. de Mulegé, Baja California Sur, Mexico. Scale: Crystal size 4.5 mm. © Thomas Witzke / Abraxas-Verlag
Pseudobrookite: (Fe+++,Fe++)2(Ti,Fe++)O5
Comments: Black, prismatic crystals of pseudobrookite on matrix. Location: Sierra County, New Mexico, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Pseudocotunnite: K2PbCl4 (?)
Comments: Bright white botryoidal pseudocotunnite coatings. Location: Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pseudojohannite: Cu6.5[(UO2)4O4(SO4)2]2(OH)5·25H2O
Comments: SEM microphotograph of prismatic, tabular, pseudojohannite crystals from Musonoï (sample MGL 54110). (AmMin, v91, p930). Location: Musonoï quarry near Kolwezi (Shaba, Congo). Scale: Picture Size 50 µm. © American Mineralogist
Pseudolaueite: Mn++Fe+++2(PO4)2(OH)2·7-8(H2O)
Comments: Brownish yellow crystals of pseudolaueite. Location: Hagendorf, Bavaria, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals