Impressive 18kt White Gold Diamond Dress Ring. Tanzanite 5.45ct. CustomMade .Ladies Impressive custom made 18kt white gold Tanzanite and diamond ring featuring a rectangular Tanzanite colored stone weighing 5. 45 carat weight of strong dark slightly violets blue in colour. Light inclusions and good cut. This stone is surrounded by a halo of Brilliant cut diamonds weighing 24 x 1. 80 total carat weight of Brilliant cut diamonds of (VS 1 2) in clarity and (E F G) in colour. Current finger size: 5. This ring can be resized. Very