Birks Platinum Emerald Cut Diamond Ring Set. GIA Certificate 1.51ct.Platinum Diamond ring by Birks. Featuring an Emerald cut diamond weighing 1. 51 carat weight of (VS 2) in clarity and (I) in colour . This diamond is surrounded by a halo of Brilliant cut diamonds and is accompanied by a diamond band featuring 1. 50 total carat weight of Brilliant cut diamonds . The ring is currently a size 6 1 2 and can be resized. if required. Hallmark: Birks Very Good Condition. The ring is accompanied by a GIA certificate .