Lady's Platinum Yellow Sapphire & Diamond Ring. Ring Size: 6? (Can be Resized to Fit Most Any Finger) Contains: 1 Radiant Cut Yellow Natural Sapphire. Weight Approx: 6.75ct, Color: Yellow, Clarity: Transparent-LI. 2 Trilliant Cut Natural Diamonds. Weight Approx: 1.00cttw, Color: F, Clarity: VS1/VS2. If this ring were worn by an elegant enough woman, viewers might think it was a natural Fancy Light Yellow diamond. The stone was fashioned by a diamond cutter and cut in the confirmation of a radiant cut. For those of you who are new to sapphires, they are second on the hardness scale, right below the diamond. They are virtually impervious to knicks and fissures resulting from everyday use.