Multi-colored sapphire and colored stone necklace, Michele della Valle

Comprising 22 spheres pavé-set with numerous multi-colored sapphires weighing approximately 394.95 carats, accented by various colored stones including peridots, citrines, iolites, aquamarines, and pink and green tourmalines, mounted in 18 karat white gold and silver, length 20¾ inches, maker's mark, numbered 10745. Est. 15,000—20,000 USD. Lot sold 28,750 USD

Sotheby's. Magnificent Jewels. 23 Apr 09. New York www.sothebys.com Photo courtesy Sotheby's