Chalcopyrite on Siderit | Barras-Gautier-Min.https://static.wixstatic.com/media/daf8af_25101bb581f94f36a673b9b27f29107a~mv2.jpg/v1/fit/w_500,h_500,q_90/file.jpg Dimension: 18 X 13cm 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 having produced little! Ref: EC35