Gold extraction the purity of gold. The parting of gold from silver has been done since ancient times starting in Lydia in the 6th century BC. Various techniques have been practised; salt cementation from ancient times, parting using distilled mineral acids from medieval times, and in modern times using chlorination using the Miller process and electrolysis using the Wohlwill process. Gold extraction Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore. Gold mining from alluvium ores was once achieved
Commodity pathway diversion inherent market value. They reacted against this perceived commoditization of art by producing what they considered decommodified art. However, as Kopytoff argued, "commodities must be not only produced materially as things, but also culturally marked as being a certain kind of thing." Thus, when diverting industrial materials from their commodity pathways to produce art became culturally valuable, the objects themselves gained value (1985). Finally, pop artist Andy Warhol, created artwork couched in what Appadurai refers to as the "aesthetics of decontextualization." In his famous Campbell's Soup painting, Warhol diverts advertising from its commodity pathway by reproducing it as a work