Rhodium is a very bright white and shiny metal in the platinum metals group that has a resistance to corrosion. As a result, it is one of the most common metals used to plate jewelry.
In the rhodium plating process, the jewelry is submerged in a solution containing the rhodium and electricity is applied.
The rhodium in the solution then adheres to the immersed jewelry. Rhodium is often used to plate white gold and silver jewelry to make the pieces look whiter and brighter.