Rhodium

Rhodium is a chemical element (symbol Rh) with a silvery, highly reflective surface and high resistance to corrosion. It is a rare, silver-white metal used mainly as a catalyst and for plating to prevent tarnish. In commerce, it appears in alloys such as platinum–ralloy jewelry and catalytic converters. Its name derives from the Greek word for rose, alluding to its color in certain compounds.