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 seen as a commodity by one person and something else by another. Such shifts and differences in whether and when a thing is a commodity reveal a moral economy that stands behind the objective economy of visible transactions. In his discussion of commoditization, he also presents the idea of singularization which occurs because "there are things that are publicly precluded from being commoditized…[and are] sometimes extended to things that are normally commodities—in effect, commodities are singularized by being pulled out of their commodity sphere." Kopytoff goes on to describe ways in which commodities can be singularized, for example, through restricted