Emeralds @ Sotheby's. Magnificent Jewels. 20 Apr 10. New York

Platinum, Emerald and Diamond Ring. photo Sotheby's

The cushion-shaped emerald weighing 11.51 carats, flanked by half-moon-shaped diamonds weighing 1.60 carats, size 5¾. Est. 250,000—350,000 USD. Lot Sold 374,500 USD

Accompanied by AGL report no. CS 80059 stating that the emerald is of Colombian origin, clarity enhancement: none; and GRS report no. GRS2009-111385 stating that the emerald is of Colombian origin.

18 Karat Gold, Emerald and Diamond Ring. photo Sotheby's

The emerald-cut emerald weighing approximately 5.00 carats, flanked by baguette diamonds weighing approximately 1.20 carats, size 7½. Est. 70,000—90,000 USD. Lot Sold 86,500 USD

Accompanied by AGL report no. CS 41826 stating that the emerald is of Colombian origin, clarity enhancement: faint.

Platinum, 18 Karat Gold, Emerald and Diamond Ring. photo Sotheby's

The emerald-cut emerald weighing 6.73 carats, framed and flanked by round diamonds weighing approximately 2.50 carats, size 6. Est. 35,000—45,000 USD. Lot Sold 65,500 USD

Accompanied by AGL report no. CS 41662 stating that the emerald is of Colombian origin, clarity enhancement: none.

Emerald and Diamond Ring. photo Sotheby's

The cushion antique mixed-cut emerald weighing 4.61 carats, flanked by cushion-shaped and round diamonds weighing approximately 2.00 carats, mounted in platinum, size 6¼. Est. 50,000—70,000 USD. Lot Sold 56,250 USD

Accompanied by AGL report no. CS 40178 stating that the emerald is of Colombian origin; Clarity Enhancement: None.

Emerald and Diamond Ring. photo Sotheby's

The emerald-cut emerald weighing 6.89 carats, flanked by triangular-shaped diamonds weighing approximately 1.80 carats, mounted in platinum and 18 karat gold, size 4. Est. 20,000—30,000 USD. Lot Sold 38,750 USD

Accompanied by AGL report no. CS 41797 stating that the emerald is of Zambian origin, clarity enhancement: insignificant.

Pair of Emerald and Diamond Earclips. photo Sotheby's

The emerald-cut emeralds weighing approximately 21.60 carats, framed by round diamonds weighing approximately 4.00 carats, mounted in 18 karat gold. Est. 30,000—40,000 USD. Lot Sold 37,500 USD

Sotheby's. Magnificent Jewels. 20 Apr 10. New York www.sothebys.com