in the beginning of the XX century. In 1912, a group of mining engineers and activists, lead by Jan Zarański...time. The materiał excavated from the underground mine was of much better quality - less crackcd and weathered...Poprzednie ~trony:J fasywna miedź rO'lzhn. Caledonia Mine, Ontonagon County, Michigan, USA. 300xl 80xl40 mm...Previous page!: .,fassiv~ native copr>er.C· ledonia Mine, Ontonagon County, Michigan, USA. 300x I 80xl40...---· Native copper Cu on matrix. ½'hite Chapel Mine, Michigan, USA. J45x J 30x45 mm. ne njeregularnie |