 Platinum is a precious metal commodity ; its bullion has the ISO currency code of XPT . Coins , bars , and ingots are traded or collected . Platinum finds use in jewellery , usually as a 90 – 95 % alloy , due to its inertness . It is used for this purpose for its prestige and inherent bullion value . Jewellery trade publications advise jewellers to present minute surface scratches ( which they term patina ) as a desirable feature in attempt to enhance value of platinum products . 
