18K White Gold Round Blue Sapphire Engagement Ring With Trapezoid-Cut Diamond Accents And Diamond HaloThis fabulous 18K white gold engagement ring with a 4. 12 carat round cut, beautiful blue sapphire will take your breath away. A single row of round brilliant cut diamonds trace delicately around the gorgeous, deep blue sapphire center stone. A white trapezoid cut diamond rests on each side of the blue sapphire and is edged by round diamonds. Three round diamonds extend down the shank past the diamond framed trapezoidal diamonds.