3.28 Blue Sapphire Three Stone Engagement Ring 14kThis three stone engagement ring features a 3. 28 carat oval cut blue sapphire and . 93 carats of diamonds in 14 karat yellow gold. The center sapphire displays a rich blue color and sits securely in four prongs. Two round brilliant cut diamonds flank the sapphire, each weighing . 465 carats and adding serious sparkle to the sides. The oval cut creates an elongated silhouette on the finger while maximizing the sapphire's color. All three stones sit in