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N08629_408_lr_1

Cat's-eye chrysoberyl and diamond ring. photo Sotheby's

The oval cabochon cat's-eye chrysoberyl weighing approximately 17.00 carats, flanked by tapered baguette diamonds, mounted in platinum, size 8. Est. 12,000—15,000 USD. Lot Sold 22,500 USD

N08629_269_lr_1

Platinum, Orange Topaz and Diamond Ring. photo Sotheby's

The oval orange topaz weighing 17.81 carats, framed by round diamonds weighing approximately .45 carat, size 6. Est. 12,000—15,000 USD. Lot Sold 20,000 USD

Accompanied by GIA report no. 2115612850 stating Orange Topaz.

N08629_271_lr_1

Fire Opal, Near Colorless Diamond and Black Diamond Ring, Sifen Chang. photo Sotheby's

The carved fire opal measuring approximately 21.8 by 21.1 mm., framed by round near colorless diamonds weighing approximately 2.00 carats, and round black diamonds weighing approximately 1.30 carats, mounted in 18 karat blackened gold, size 6, maker's mark for Sifen Chang. Est. 12,000—15,000 USD. Lot Sold 15,000 USD

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