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Walentaite: (Ca,Mn++,Fe++)Fe+++3(AsO4)(PO4)3(PO3OH)
Comments: Greenish yellow, flattened, radial, crystalline aggregates of walentaite on quartz. Location: White Elephant mine, Custer County, South Dakota, USA. Scale: Picture size 1.5 cm. © Tom Loomis / Dakota Matrix