Volborthite : Cu3(V2O7)(OH)2·2H2O
Chalcocite : Cu2S
50mm x 41mm x 2mm
Photo added to mindat.org
“Yellow volborthite incrustations on black chalcocite matrix. Overall size: 50 x 41 x 2 mm
Photo and collection Antonio Borrelli
”
Antonio Borrelli - 17th December 2005
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