Classic Oval Shaped 30 Carat Diamond Crystalline Riviera necklace available in 16 or 18 inches. Stone Type: Diamond Crystalline Total Carat Weight: 30ctw Stone Shape: Oval Metal Type: Sterling Silver 925 Metal Finish: Platinum Necklace Length: Available in 16 or 18 inches Style ID: Sophia 02 Final sale. No exchanges. No returns.