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Weloganite: Sr3Na2Zr(CO3)6·3(H2O)
Comments: Columnar aggregates of Weloganite crystals. Location: Francon quarry, Montreal, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Wermlandite: (Ca,Mg)Mg7(Al,Fe+++)2(SO4)2(OH)18·12(H2O)
Comments: Dark colored, hexagonal platelet of wermlandite on matrix. Location: Langban, Varmland, Sweden. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Wherryite: Pb7Cu2(SO4)4(SiO4)2(OH)2
Comments: Green, acicular wherryite crystals. Location: Mammoth mine, Tiger, Pinal County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Whiteite-(CaMnMg): CaMn++Mg2Al2(PO4)4(OH)2·8(H2O) Lazulite: MgAl2(PO4)2(OH)2
Comments: Light beige-colored whiteite-(CaMnMg) crystal perched on dark blue lazulite. Location: Rapid Creek, Yukon Territory, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Whitlockite: Ca9(Mg,Fe++)(PO4)6(PO3OH)
Comments: Clear, transparent whitlockite crystal. Location: Palermo #1 mine, North Groton, Grafton County, New Hampshire, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Whitmoreite: Fe++Fe+++2(PO4)2(OH)2·4(H2O)
Comments: Two stellate crystal clusters of whitmoreite. Location: Big Chief mine, Keystone, Penninton County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Wickmanite: Mn++Sn++++(OH)6
Comments: Colorless wickmanite crystals. Location: Langban, Varmland, Sweden. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Wollastonite-2M: CaSiO3
Comments: Wollastonite-2M crystals. Location: Monte Somma (Vesuvius), Campania, Italy. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Wolsendorfite: (Pb,Ba,Ca)U2O7·2(H2O)
Comments: Red orange druse of tabular wolsendorfite crystals. Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Wyartite: Ca3U++++(UO2)6(CO3)2(OH)18·3-5(H2O) Rutherfordine: UO2(CO3)
Comments: Brown, acicular wyartite crystals next to bright yellow rutherfordine tufts. Location: Shinokolbwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals