Artisanal and SmallScale Gold Mining Without .
Many artisanal and smallscale miners are achieving high rates of gold recovery without mercury, benefiting their health, the health of their communities, and the environment. On this page, we summarize some of the techniques in mercuryfree artisanal and smallscale gold mining. Using Concentration Methods. Concentration means increasing the amount of gold in ore or sediment, by selectively ...