Sapphire, Diamond, Gold Necklace The necklace features oval-shaped sapphires weighing a total of approximately 8.50 carats, enhanced by full-cut diamonds weighing a total of approximately 0.35 carat, set in 18k gold. Gross weight 15.30 grams. Length: 15-1/4 inches Centerpiece Dimensions: 1/2 inch x 11/16 inch