Rhodium (Rh), is one of the platinum group metals.It is silvery-white and has a very reflective surface. Rhodium is very hard, durable, and highly resistant to corrosion. It is harder and has a higher melting point than both platinum and palladium, making it a useful hardening element in alloying. The element's major use (consuming about 80% of world rhodium production) is as one of the catalysts in the three- way catalytic converters in automobiles.Around 80- 90% of rhodium comes from South African platinum mines