Rhodium's brilliance, hardness, and beauty make it a favorite. Rhodium a noble metal, hard, silvery, durable with a high reflectance and is resistant to corrosion. It is one of the rarest and most valuable precious metals, found in platinum, or nickel ores together with the other members of the platinum group metals. Rhodium is extremely durable; it resists tarnish and is very resistant to scratching, and acids.