Gold Nano Particles - A New Way to Purify Gold

Mediaeval africans had a unique process for purifying gold with glass, by evan nicol brown. They took ore and other raw materials typically found in rivers, and mixed it with glass before heating it up. Gold is inert, so while the various impurities and other materials melted into the glass, the gold remained. And so walton's team here, they used sand, gold dust and recycle glass to reproduce the same process.