Rhodium is a chemical element that is a rare, silvery-white, hard transition metal and a member of the platinum group. Rhodium is found in platinum ores and is used in alloys with platinum and as a catalyst. It is abbreviated in the periodic table to Rh and has atomic number 45.
It is typically the most expensive precious metal approx10 time costly metal than gold. It is not a feasible material to make solid jewellery because it is too stressed and brittle, but rhodium is fabulous as a plating for jewellery because it is glitteringly, dazzlingly, white and mirror-like. It makes diamonds look bigger and better because it's so bright that it's almost hard to see where the stones end and the metal begins. Nothing sets off diamonds like rhodium plating does, but it is only a plating and therefore it will wear off and require replating Rhodium plating is a finish that is applied to all white gold platinum and also for yellow gold jewellery to give it a white look. It will look exactly the same on the low cost and most expensive of jewellery, as you are seeing the reflective brilliance brilliant white colour of the rhodium plating but not the true colour of the metal below. In time the rhodium plating will wear off and the true colour of the metal will visible.