Rhodium is a somewhat rare, hard, silvery-white metal that is part of the platinum family. Rhodium's highly luminescent and reflective qualities make rhodium electroplating a commonly used process in the manufacturing of white gold or platinum-based jewelry items.
Rhodium electroplating also improves a material's resistance to corrosion, enabling it to retain its brightness and improve its durability in many types of atmospheric conditions. All surface imperfections must be removed before rhodium electroplating, as the process can make these defects show more clearly. Rhodium electroplating may also be used with silver or copper and their various alloys.