Round Cut Genuine Opaque Black DiamondThese loose round faceted genuine mined opaque black diamonds are available for a custom built ring by Nodeform Jewelry. Select your stone size, then select a ring setting that fits the shape and size of the selected stone. Add both to your cart and we'll create your ring! Diamond Specs: Sizes: 4. 3 5. 2 mm 0. 5ct, 5. 1 5. 5 mm 0. 0. 75ct, 5. 5 6. 3 mm 1. 0ct, 6. 00 6. 5 mm 1. 25ct, 6. 4 6. 85 mm 1. 5ct, 6. 7 7. 2 mm 1. 75ct, 7. 1 7. 8 mm 2. 0ct