Mineral Specimen Images (W)

Walpurgite: Bi4(UO2)(AsO4)2O4·2(H2O)

Comments: Elongated, pale yellow, triclinic crystalline aggregate of walpurgite on calcite.
Location: Walpurgis Flacher vein, Weißer Hirsch Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Crystal size 1 cm.
© Paul M. Schumacher

Walstromite: BaCa2Si3O9

Comments: Colorless massive walstromite with pronounced cleavage, showing strong orange-pink fluorescence under long-wave ultraviolet light in inset image.
Location: Esquire number 8 mine, Big Creek, Fresno County, California, USA. Scale: See Image.
© Rruff Database

Walthierite: Ba0.5Al3(SO4)2(OH)6

Comments: SEM BSE image of subhedral and euhedral walthierite (light gray) enclosed within alunite (dark gray). (AmMin, v77:1275).
Location: El Indio gold, silver, and copper deposit, Tambo mining district, Coquimbo region, Chile. Scale: See Image.
© American Mineralogist

Wardite: NaAl3(PO4)2(OH)4·2(H2O)  
Gordonite: MgAl2(PO4)2(OH)2·8(H2O)

Comments: Prismatic gordonite crystals on massive wardite.
Location: Clay Canyon, Fairfield, Utah County, Utah, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Wardite: NaAl3(PO4)2(OH)4·2(H2O)

Comments: Cream-colored, blocky wardite crystals. The largest wardite crystal is 0.5 cm across.
Location: Taquaral, Minas Gerais, Brazil. Scale: Picture size 1.5 cm.
© John Veevaert

Wardite: NaAl3(PO4)2(OH)4·2(H2O)  
Crandallite: CaAl3(PO4)2(OH)5·(H2O)

Comments: Sliced and polished slab of yellow to white mixture of wardite and crandallite.
Location: Clay Canyon, Fairfield, Utah Co., Utah, USA. Scale: 11x6x.6 cm.
© John Betts - Fine Minerals

Warikahnite: Zn3(AsO4)2·2(H2O)

Comments: Divergent, acicular aggregate of yellowish, brownish orange warikahnite crystals on a white quartz matrix. William Pinch collection. Featured on the cover of the Mineralogical Record, 36:4..
Location: "O" stope, 31st level, Tsumeb mine, Namibia.. Scale: 3 x 4.9 cm.
© Jeff Scovil

Warwickite: Mg(Ti,Fe+++,Al)(BO3)O  
Chondrodite: (Mg,Fe++)5(SiO4)2(F,OH)2

Comments: Black crystalline warwickite with tan chondrodite in white marble.
Location: Amity, near Warwick, Orange County, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Watanabeite: Cu4(As,Sb)2S5

Comments: Polished section image of grain aggregate of watanabeite (Wat) to demonstrate the outline of grains and anisotropy; A in plane polarised light (PPL), B with crossed polars (XPL). (MinMag, v57:389).
Location: Occurs with quartz in a hydrothermal vein at the Teine mine, Sapporo, Hokkaido, Japan. Scale: Scale Bar 0.5 mm.
© Mineralogical Magazine

Watatsumiite: Na2KMn2LiV2Si8O24  
Potassicleakeite: KNa2Mg2Fe+++2LiSi8O22(OH)2

Comments: Yellow green prismatic crystal of watatsumiite terminated by pyramidal faces associated with reddish brown potassicleakeite and clear quartz (JMPS, v 98, p 149).
Location: Tanohata mine, Iwate Prefecture, Japan. Scale: See Image.
© JMPS

Watkinsonite: PbCu2Bi4(Se,S)8

Comments: BSE image of watkinsonite (W) intergrown with clausthalite (W). (CanMin, v43:899).
Location: Uranium deposit at Niederschlema-Alberoda, Germany. Scale: See Image.
© Canadian Mineralogist

Wattersite: Hg+4Hg++Cr++++++O6

Comments: Deep red-black resinous wattersite on quartz.
Location: Clear Creek Mine, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wattevilleite: Na2Ca(SO4)2·4(H2O) (?)

Comments: White masses of wattervilleite scattered on lingite matrix. Label gives locality simply as Bischofsheim. Photographed under indirect natural light, hence the deep blue reflections and shadow areas.
Location: Einigkeit Mine, Bauersberg Mt., Bischofsheim, Rhön Mts, Franconia, Bavaria, Germany. Scale: Field of view 0.25 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Wavellite: Al3(PO4)2(OH,F)3·5(H2O)

Comments: Greenish yellow spray of wavellite crystals.
Location: Slate Mountains, El Dorado County, California, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Wavellite: Al3(PO4)2(OH,F)3·5(H2O)

Comments: Green prismatic crystals of wavellite in complete radial stellar aggregate.
Location: Flinders Range, South Australia, Australia. Scale: Sphere size 8 mm.
© Tom Loomis / Dakota Matrix

Waylandite: BiAl3(PO4)2(OH)6  
Bismite: Bi2O3

Comments: Gray massive stream rounded waylandite with tan bismite crusts.
Location: Mumba, Nord-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Weberite: Na2MgAlF7  
Cryolite: Na3AlF6

Comments: Gray weberite masses in white cryolite.
Location: Ivigtut, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Weberite: Na2MgAlF7  
Jorgensenite: Na2(Sr,Ba)14Na2Al12F64(OH,F)

Comments: SEM image of polished section of aluminofluoride vein mounted in epoxy. Bladed jorgensenite (Jor), barite (Bar) and weberite (Web) with minor quartz, bøgvadite, schorl, pyrite, galena, chalcopyrite and chalcocite.
Location: Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Firth, Arsuk, Kitaa (West Greenland) Province, Greenland. Scale: See Image.
© Pavel M. Kartashov

Weddellite: Ca(C2O4)·2(H2O)

Comments: Tan prismatic weddellite crystal sprays in vug.
Location: Near Biggs, Wasco County, Oregon, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Weeksite: K2(UO2)2Si6O15·4(H2O)

Comments: Bright yellow weeksite aggregates.
Location: Anderson mine, Yavapai County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals