3 carat Elongated Cushion Cut Diamond Ring Ascot Diamonds GIA Certified 2.51 Carats Brilliant Round Diamond Solitaire Engagement RayRay Taylor Vintage circa 1950s 18 Carat Yellow and White Gold Round Brilliant 1.50ct Lara Round Brilliant Cut Diamond Solitaire 18ct Yellow Gold. This elegant solitaire features a single base basket with claw prongs that cradle the centre diamond. The petite band adds to the sleek, classic look of this ring. Handmade in 9ct or 18ct yellow and white gold.