David Webb Platinum Oval Cabochon Cut Turquoise And Diamond Ring. Centrally set with an oval-shaped cabochon turquoise, within an ornate setting of marquise and baguette cut diamonds weighing approx. 4.41cttw. Ring top measures 5/8 inch width. Center Diamond Weight: 4.50 Measurements: Size: 6.5 Metal Type: Platinum Metal Weight: 12.8 gr. Signed: WEBB Condition: Excellent. Stock: RR8554