What is Rhodium?
Of the platinum group metals and the most expensive metal in the world, rhodium is the most widely used material when tarnish prevention is of the highest priority.
Among rhodium's desirable properties is it's brilliant white color, high reflectivity, and resistance to incidental surface abrasion. It can be used as a final anti-tarnish finish over silver or nickel items to eliminate short term discoloration as silver typically is found to do. It is especially effective for necklaces and chains where contact with natural oils from the skin can quickly dull most non-gold jewelry items.