Gorgeous half eternity band of genuine tanzanite gemstones. The setting is solid sterling silver with platinum overlay. It is incredibly durable and has an arthritis shank that can be opened to remove without pulling over the knuckle. Size 5 Stamped D'Joy 925 ***Tanzanite is exclusively mined in one area of the world: Merelani, a small region in northern Tanzania, near Mount Kilimanjaro. The area is only 17 kilometers long and has been divided into four mining blocks (A-D) by the Tanzanian government. Tanzanite is recognized as one of the world's rarest gemstones. Jewelry from QVC, HSN, JTV, Gemporia, Kay Jewelers, Shop HQ.