In parts of Madre de Dios, one of Peru’s most biodiverse regions ... separating the heavier gold particles. The gold dust is then heated with borax, a mineral salt, until molten, then a coin-sized ...

Peruvian Metals, a Canadian exploration and mineral processing company, has agreed to sell its 100% interest in the Maria Norte gold-silver-zinc-lead project in Peru, a non-core asset, to Rio ...