Lady's Platinum 11.50ct Yellow Sapphire & Diamond Ring. Ring Size: 6? (Can be Resized to Fit Most Any Finger) Contains: 1 Oval Cut Natural Yellow Sapphire. Weight Approx: 11.50ct, Color: Yellow, Transparency: Transparent-LI. 16 Round Brilliant Cut Natural Diamonds. 6 Baguette Cut Natural Diamonds. Weight Approx: 0.45cttw, Color: G-H, Transparency: VS1/VS2. A fantastic yellow sapphire in a vintage platinum diamond ring signed YARD. Raymond Yard is very much in favor these days by people who are collecting jewelry from his period. A Yard piece just sold at a Christie's for $45,000, so the market is still in a bit of turmoil.