Using Borax Flux to Refine Gold - Manhattan Gold & Silver
Aug 07, 2013· Using Borax Flux to Refine Gold. August 7, 2013. ... As all of the minerals melt down, they separate from one another. As the process continues, the borax causes the other minerals to oxidize and breakdown even further. Gold is unaffected by this reaction and sinks to the bottom of the mixture, intact. ... Manhattan Gold & Silver Update.