“This twelve and a half kilo gold bar is worth about $1 million, but as you guys can see there's a lot of dark spots in here impurities :(”

@humphreytalks · 3.4M followers

A man in a gold factory explains the process of refining gold. He shows a gold bar with impurities and then demonstrates how it's melted, cast into an anode, and dipped into a solution to strip impurities, resulting in a gold sponge that is further processed into various gold products.