Magnificent Handmade Art Deco 18K White Gold Hand Cut Sapphire Solitaire Diamond Engagement Ring. This gorgeous ring features 1 brilliant round diamond, weighing .72 carats, natural hand cut blue sapphires, totaling 2.5 carats, surrounded by numerous brilliant round diamonds, totaling .40 carats. The center diamond is G color and SI clarity. The ring weighs 6.3 grams. It is a size 6.5. Sizing is available.ms. It is a size 6.5. Sizing is available.