Lady's 18K White & Yellow Gold Gregg Ruth Diamond Engagement Ring. Ring Size: 6 1/2 (Can be Resized to Fit Most Any Finger.) Contains: One Natural Round Brilliant Cut Diamond. Weight Approx: 2.01ct, Color: H-I, Clarity: VS1 / VS2. Side Stones: Two Natural Fancy Yellow Princess Cut & Natural Fancy Yellow & White Round Brilliant Cut Diamonds. Weight Approx: 1.50cttw. From the internationally acclaimed designer, Gregg Ruth, comes this 18K white & yellow gold diamond engagement ring. The center stone weighs just over that important 2 carat mark to make this stone a great investment. The center stone is accented by two natural fancy yellow princess cut diamonds. The mounting is then accented more with fancy yellow & white diamonds for a grand total weight of side diamonds of 1 and a half carats.