Determining whether a ring is made of platinum involves examining its physical characteristics and markings. Platinum is a dense, silvery-white metal that is highly resistant to corrosion and tarnishing. It is often used in jewelry because of its durability and hypoallergenic properties.
One way to tell if a ring is platinum is to check for a hallmark or stamp. Platinum rings typically have a hallmark that indicates the purity of the metal. The most common platinum hallmarks are “PLAT,” “PT950,” and “PT900.” These hallmarks indicate that the ring is made of 95% or 90% pure platinum, respectively.