Birks 18kt Yellow Gold Blue Sapphire and Diamond Checkerboard Ring.18kt yellow gold Birks blue Sapphire and Diamond checkerboard ring. This ring features 0. 30 total carat weight of square cut blue Sapphires and 0. 28 total carat weight of brilliant cut diamonds of VS in clarity and (G) in colour. Channel set. Current finger size: 6 1 2. This ring can be resized. Hallmark: Birks. Very Good Condition. Accompanied by a Van Rijk appraisal certificate