2.52 Sapphire & Diamond Three Stone Engagement Ring 14kThis three stone engagement ring features a 2. 52 carat GIA certified cushion cut sapphire and . 61 carats of trapezoid diamonds in 14 karat yellow gold. The center sapphire displays a bluish green color with no heat treatment, making it a rare natural gemstone. Two trapezoid cut diamonds flank the center stone, each weighing . 305 carats and measuring 6. 00 x 4. 50 x 3. 00 mm. The sapphire sits in a four prong basket that secures the stone while