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Agardite-(Nd): (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O)
Comments: Bluish-green agardite-(Nd) crystals and green conichalcite botroids. Location: Big Three Mine, Esmeralda County, Nevada, USA. Scale: Specimen Length 4 cm. © Adam Larson