“Pure gold can be created in factories through several processes, primarily involving refining and purification of gold ore or recycled gold materials…”
https://www.youtube.com/watch?v=FCGf_POjxKM
Inside Gold Factory
Au and You
“Pure gold can be created in factories through several processes, primarily involving refining and purification of gold ore or recycled gold materials…”
https://www.youtube.com/watch?v=FCGf_POjxKM