Rings › 1.56ct Round Solitaire- SQ9719588 Image 1 of 1 1.56ct Round Solitaire- SQ9719588 $5,200.00 A Round Solitaire Lab Diamond weighing 1.56cts, F SI1, with a 18kt Yellow Gold band and 18kt White Gold shank. Add To Cart Added! A Round Solitaire Lab Diamond weighing 1.56cts, F SI1, with a 18kt Yellow Gold band and 18kt White Gold shank.