Natural copper from USA - 21kg-
PUMI2249
Block of 21kg of native copper from the USA (Michigan). It is the raw form of copper as found in nature. Natural, but partially polished, since copper oxidizes over time and takes on this beautiful green color. The contrast of the 2 colors gives him all his interest. This huge block has a very rare high proportion of copper Only a few specimens have been taken out of the mine intact, while the vast majority are crushed and then melted into ingots. This one will therefore escape his destiny...
