Researchers have developed an environmentally friendly method for recycling and purifying metals. Using gold earrings from a pawnshop in Gothenburg and biodiesel from the nearest filling station, the ...

Humble fragments of clay crucibles and coin molds flecked with gold excavated by a joint team of British and Malian archaeologists in 2005 led archaeologist Sam Nixon, in consultation with Thilo ...

Nearly 20 percent of the world’s gold supply is produced by workers in artisanal and small-scale gold mining shops that purify gold by burning off mercury. Researchers have teamed up to stop this ...

Chalmers University researchers develop a sustainable method for gold recycling using biodiesel. The method effectively extracts pure gold from mixed metals and is applicable to other socially ...

A new method for recovering high-purity gold from discarded electronics is paying back US$50 for every dollar spent, according to researchers – who found the key gold-filtering substance in ...