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Crystal aggregate of whiterockite. The scale bar is 20 μm in length. Holotype specimen: South Australian Museum registration number G34889. Mineral

Whiterockite

whiterockite
Whitlockite Locality: Palermo No. 1 Mine (Palermo #1 pegmatite), Groton, Grafton County, New Hampshire, USA (Locality at mindat.org) Size: large cabinet, 16 x 15 x 13 cm Whitlockite This huge specimen is probably the richest whitlockite specimen extent, for good quality, according to Whitmore and several people I consulted. He recovered it himself over 20 years ago from a small pocket in the mine he owns. It has great coverage and richness, but what really makes it notable are the huge, unusually well-developed crystals to nearly 1 centimeter. Most of the major crystals are clustered around one protected pocket, as well. Whitlockite is a very interesting species at the moment as some "whitlockites" have proven to be the new species Bobdownsite - this, however, is thought to remain a whitlockite. Pen shown for scale. Ex. Robert Whitmore Collection. Mineral

Whitlockite

whitlockite

Formula
Ca9Mg(PO4)6(PO3OH)
Whitmoreite Locality: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Hagendorf, Waidhaus, Vohenstrauß, Oberpfälzer Wald, Upper Palatinate, Bavaria, Germany (Locality at mindat.org) Picture width 2 mm. Collection and photograph Christian Rewitzer Mineral

Whitmoreite

whitmoreite

Formula
Fe²⁺Fe³⁺2(PO4)2(OH)2 * 4H2O
Outstanding rossettes of hexagonal colorless microcrystals of the rare mineral wickenburgite. From: Potter Cramer Mine, Maricopa County, Arizona, United States of America. Mineral

Wickenburgite

wickenburgite

Formula
CaPb3Al2Si10O24(OH)6
Yellow Wickmanite crystal Picture width: 3 mm Locality: Pitkyaranta mining district, Pitkyarantsky District, Republic of Karelia, Russia (Locality on mindat.org) Mineral

Wickmanite

wickmanite

Formula
Mn²⁺Sn⁴⁺(OH)6
Dark green aggregates of the rare phosphate mineral wicksite from the TL in Yukon (Big Fish River, Yukon, Canada) and one of the only three known localities worldwide. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Wicksite

wicksite

Formula
NaCa2(Fe²⁺,Mn²⁺)4MgFe³⁺(PO4)6 * 2H2O
Mineral

Widenmannite

widenmannite

Formula
Pb2(OH)2[(UO2)(CO3)2]
Widgiemoolthalite Locality: 132 North Mine, Widgiemooltha, Western Australia, Australia (Locality at mindat.org) Green crystals of Widgiemoolthalite on yellowish-green Gaspéite. Field of view 2 mm. Specimen and photo Leon Hupperichs. Mineral

Widgiemoolthalite

widgiemoolthalite

Formula
Ni5(CO3)4(OH)2·4-5H2O
Pale yellow prismatic crystals of the very rare Mg borate mineral wightmanite from Crestmore Quarries, Riverside County, California, United States of America. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Wightmanite

wightmanite

Formula
Mg5(BO3)O(OH)5 * 2H2O
Mineral

Wiklundite

wiklundite

Formula
Pb2[4](Mn²⁺,Zn)3(Fe³⁺,Mn²⁺)2(Mn²⁺,Mg)19(As³⁺O3)2[(Si,As5+)O4]6(OH)18Cl6
Group of moraesite crystals in association with wilancookite. From Ponte do Piauí claim, Piauí valley, Taquaral, Itinga, Jequitinhonha valley, Minas Gerais, Brazil. Sample in the archives of the Geology Department - Federal University of Ouro Preto. Mineral

Wilancookite

wilancookite

Formula
(Ba5Li2☐)Ba6Be24P24O96·26H2O
Mineral

Wilcoxite

wilcoxite

Formula
MgAl(SO4)2F * 17H2O
Mineral

Wildcatite

wildcatite
Brown platy crystals of the extremely rare phosphate mineral wildenauerite from the type and only known locality worldwide in Hagendorf (Hagendorf South Pegmatite, Bavaria, Germany). Ex. Erich Laskowski collection (USA). Mineral

Wildenauerite

wildenauerite

Formula
Zn(Fe³⁺,Mn²⁺)2MnFe³⁺(PO4)3(OH)3(H2O)6*2H2O
Orange-brown crystals of the extremely rare new mineral wilhelmgumbelite (IMA 2015-072 and published in 2017), from the type and only known locality worldwide in Hagendorf mine (Hagendorf, Oberpfalz, Bavaria, Germany), in a matrix of mitridatite. Willhelmgumbelite is a Zn-Fe phosphate. Specimen analyzed by SEM. Mineral

Wilhelmgümbelite

wilhelmgümbelite
Wilhelmkleinite is an extremely rare mineral from Tsumeb (Tsumeb Mine, Otavi Highlands, Namibia), only known from this mine worldwide and labeled as RRR in G.Gebhard Tsumeb II book (1999) (single specimen!). The mine was closed in 1996, so new discoveries will not take place in the future. The mineral is an Zn-Fe arsenate and occurs as a very small olive green single crystal. Analyzed by S.Mockel. Mineral

Wilhelmkleinite

wilhelmkleinite

Formula
ZnFe³⁺2(AsO4)2(OH)2
Mineral

Wilhelmramsayite

wilhelmramsayite

Formula
Cu3FeS3*2H2O
Yellow brown crystals of the very rare mineral wilhelmvierlingite associated to rockbridgeite from Germany (Hagendorf South Pegmatite, Bavaria, Germany). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Wilhelmvierlingite

wilhelmvierlingite

Formula
CaMnFe³⁺(PO4)2(OH) * 2H2O
Black crystal aggregates of the rare iron silicate mineral wilkinsonite from the type locality in Australia (Warrumbungle Volcano, Gowen County, New South Wales) and only one of the three known localities worldwide. Mineral

Wilkinsonite

wilkinsonite

Formula
Na2Fe²⁺4Fe³⁺2(Si6O18)O2
Mineral

Wilkmanite

wilkmanite

Formula
Ni3Se4
Willemite Locality: Berg Aukas (Berg Aukus), Grootfontein District, Otjozondjupa Region, Namibia (Locality at mindat.org) Picture width 7 mm. Collection and photograph Christian Rewitzer Mineral

Willemite

willemite

Formula
Zn2SiO4
Falcondoite, Willemseite Locality: Loma Peguera, Bonao, Monseñor Nouel Province, Dominican Republic (Locality at mindat.org) Size: 4.3 x 3.0 x 0.3 cm. Falcondoite and willemseite are rare nickel, magnesium silicates found in a serpentinized harzbergite massif or an obducted ophiolite at a plate collision of oceanic crust with continental crust. The locality is in the Dominican Republic, which is the Type Locality for falcondoite. This very showy, bright green thin crust is mostly green falcondoite, with just a bit of lighter, olive willemseite. Mineral

Willemseite

willemseite

Formula
Ni3Si4O10(OH)2
Colorless gemmy willhendersonite crystals, a rare mineral at Eifel (Rother Kopf, Roth, Eifel Mountains, Germany), associated to off-white uncommon gismondite globular aggregates. Willhendersonite is a marker for other extremely rare species at Eifel. The mineral has been found in a few localities worldwide. Very nice under the microscope. Mineral

Willhendersonite

willhendersonite

Formula
KCa[Al3Si3O12] * 5H2O
Black metallic crystal aggregates of the very rare Co-Ni sulphide mineral willyamite, associated to galena, from the type locality in Broken Hill (ABH Consols Lode, Broken Hill, New South Wales, Australia). Mineral

Willyamite

willyamite

Formula
CoSbS