The most precious metal commonly found in jewelry is the silvery-white metal platinum. It is a relative newcomer to jewelry, having become popular in the past 200 years or so. Like gold, it is rare and heavy, but it is more durable than gold and is sold in purer form. It is sometimes mixed with a little bit of iridium and ruthenium, which are similar to platinum but much rarer, for added strength.
Because of its purity, platinum is excellent for people who are allergic to other metals. Its light color also makes it popular. Like white gold, it makes very white diamonds appear bright. Platinum has enjoyed an enormous resurgence in popularity in recent years. It has a very understated and old-fashioned look that has come back into style, leading more jewelry designers to work with this metal.