One of the simplest methods is using a magnet. If the gold is impure, it is likely to contain metal alloys, which can cause the ornament to be attracted to a magnet. This method, however, is not ...
Rhodium When discussing precious metals, the attention tends to be focused on gold, and maybe a few other elements like silver and platinum. These are all metals we previously covered in dedicated ...
South Africa, which hosts more than 70% of the world reserves of chrome ore and manganese ores, was dominant in ferroalloy production until 2010. In the early 2000s, South Africa was the undisputed No ...