Chalcopyrite on Siderit | Barras-Gautier-Min.https://static.wixstatic.com/media/daf8af_a9134c5a3b7c4efb82e4085c36f19d6d~mv2.jpg/v1/fit/w_500,h_500,q_90/file.jpg Dimension: 13 X 10cm Provenance: Qing lung, Guizhou Prov. China The paragenesis of these 2 minerals is excellent in quality, in particular the silky and gem-like appearance of siderite, a small deposit that has produced little! Ref: EC30