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Platinum ringsPlatinum is a dense, stable and rare metal that is often used in jewelry because of its attractive silver-like appearance. Platinum is a highly valued and desired metal with a wide range of uses, including jewelry, catalytic converters, electrical contacts, pacemakers, drugs and magnets. Platinum is a silver-white metal — it was once known as "white gold." It is extremely resistant to tarnishing and corrosion (which makes it known as a "noble metal") and is very soft and mal …