Gold mines and refinning in Colombia by Diego Giudice
|
21. 69154.JPG21 of 30
The second melting of a raw gold bar to get a more refined product suitable for export, Medellin, Colombia
|
|
21. 69154.JPG21 of 30
The second melting of a raw gold bar to get a more refined product suitable for export, Medellin, Colombia
|