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Volborthite: Cu++3V+++++2O7(OH)2·2(H2O) Vashegyite: Al11(PO4)9(OH)6·38(H2O) or Al6(PO4)5(OH)3·23(H2O)
Comments: Small bluish-white crystals of vashegyite with green volborthite.
Location: Jeremias Glück Mine (Fairy Grotto), Garnsdorf, Saalfeld, Thuringia, Germany.
Scale: Picture size 1.8 mm.
© Thomas Witzke / Abraxas-Verlag
Comments: Shale with a heavy coating of brilliant green, scaly crystals of volborthite.
Location: Monument #1 Mine, Apache County, Arizona.
Scale: 6.5 x 5.5 cm.
© John Veevaert