| without a glance on geological formation of the region where it occurs, which should precede detailed...pyrite, secondary copper sulphides (bornite and chalcocite), very rare bismuth, bismutite and silver iodide...study limestone sedimentation conditions in the region. Specimens of native copper from the Kew naw Peninsula...Górniczy „Rudna''. 70x70x30 mm. Bornite Cu,feS, and chalcocite Cl½Sin black copper-bearing shale. "Rudna" Mine...interesting for collectors, especially chalcopyrite, chalcocite, bornite, and covellite. Brown and almost white |
