Platinum is relatively rare and is more valuable than gold. It has become the most precious of all metals used in jewelry. Its popularity has surfaced in recent years due to its durability and nice silver-white color. Platinum is heavy and is offered in a purer form. Small amounts of iridium and ruthenium, rare metals in the platinum family, are usually added to increase its hardness and durability. Jewelry that is made is usually 95% platinum and 5% alloy. Platinum is not measured in karats like gold but is stamped PT or PLAT to identify that it is platinum and will be accompanied by the number 950. Jewelry settings made of platinum provide a nice accent to white diamonds. Platinum has less chance of turning color than white gold due to its purity. It can be polished easily to restore its beautiful finish. This metal is also an excellent choice for people who may be allergic to other metals such as nickel, which may be added to gold.