Kay Jewelers Blueberry Tanzanite Ring 1/2 ct tw Diamonds 14K Vanilla Gold- Gemstone: An oval Blueberry Tanzanite™ is nestled between curves of Le Vian Chocolate Diamonds® in this spectacular ring for her. Rows of Vanilla Diamonds™ add brilliance to the 14K Vanilla Gold™ band. The ring has a total diamond weight of 1/2 carat. Le Vian®. Discover the Legend.