12.35 CT. Oval Cut Blue Sapphire and Round Brilliant Halo Diamond Ring in PlatinumProduct Description: An extraordinary 10 carat natural oval cut blue sapphire dominates this platinum halo ring, its deep, saturated blue displaying the rich color intensity found only in exceptional stones of this size. Sixteen round brilliant natural diamonds totaling approximately 2. 50 carats form a double halo around the center sapphire, with additional pav diamonds cascading down the wide, sculpted shoulders of the band. The layered diamond work