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18 Karat Gold, Colored Diamond, Emerald and Onyx 'Tiger' Ring, Cartier. photo courtesy Sotheby's

Set with round single-cut diamonds of yellow hue, accented by black onyx stripes and nose, the eyes set with marquise-shaped emeralds, size 4½, signed Cartier, numbered 607984, partial maker's mark, one onyx segment missing. Estimate 12,000—15,000 USD. Lot Sold 43,750 USD

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18 Karat Gold, Peridot, Ruby and Diamond Seahorse Brooch, Tiffany & Co. photo courtesy Sotheby's

The body set with round peridots, accented by a round ruby at the head, further set with round diamonds weighing approximately .75 carat, signed Tiffany & Co. Estimate 20,000—30,000 USD. Lot Sold 28,750 USD

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18 Karat Gold Elephant Cuff Bracelet, Cartier, France. photo courtesy Sotheby's

Designed as a line of elephants, the eyes set with round emeralds, gross weight approximately 97 dwts., internal circumference 6½ inches, signed Cartier, numbered 682639, maker's mark, French assay mark. Estimate 12,000—15,000 USD. Lot Sold 20,625 USD

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18 Karat Gold, Ruby, Diamond, Bone and Enamel Walrus Brooch, Tiffany & Co., Circa 1965. photo courtesy Sotheby's

Set with round diamonds weighing approximately 1.15 carats, round and cabochon rubies, and bone tusks, applied with red, blue, green and white enamel, signed Tiffany & Co., designed by Donald Claflin. Estimate 8,000—12,000 USD. Lot Sold 18,750 USD

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18 Karat Gold and Cat's-Eye Chrysoberyl Cat Pendant/Brooch, Tiffany & Co. photo courtesy Sotheby's

The eyes set with round cabochon cat's-eye chrysoberyls, gross weight approximately 58 dwts., signed Tiffany & Co. Estimate 8,000—12,000 USD. Lot Sold 17,500 USD

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18 Karat Gold, Platinum, Rock Crystal, Diamond and Ruby Frog Brooch, David Webb. photo courtesy Sotheby's

Set in the center with a pear-shaped rock crystal measuring approximately 40.0 by 24.0 mm., the face accented by round diamonds weighing approximately .70 carat, and the eyes set with cabochon rubies, signed Webb. Estimate 10,000—15,000 USD. Lot Sold 13,750 USD

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Ruby and diamond dragonfly pendant-brooch, Trio. photo courtesy Sotheby's

Set with round diamonds weighing approximately 7.35 carats, additionally set with oval and pear-shaped rose-cut rubies, mounted in 18 karat white and yellow gold, signed Trio. Estimate 10,000—15,000 USD. Lot Sold 12,500 USD

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18 Karat Gold, Rose Quartz and Diamond Flamingo Brooch. photo courtesy Sotheby's

Set in the center with an oval cabochon rose quartz weighing approximately 122.00 carats, accented by round near colorless diamonds and round diamonds of black and yellow hue weighing a total of approximately 7.00 carats, the eyes set with round rubies, mounted in 18 karat pink, yellow and blackened gold. Estimate 7,000—9,000 USD. Lot Sold 9,375 USD

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18 Karat Gold and Lapis Lazuli Frog Brooch, David Webb. photo courtesy Sotheby's

Set in the center with a fluted lapis lazuli segment measuring approximately 31.6 by 21.0 mm., the eyes set with fluted lapis lazuli segments, signed Webb. Estimate 7,500—10,000 USD. Lot Sold 9,375 USD

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18 Karat Gold, Diamond and Colored Stone Monkey Brooch, David Webb. photo courtesy Sotheby's

Set with round diamonds, cabochon rubies and round emeralds, the face applied with white enamel, signed Webb. Estimate 6,000—8,000 USD. Lot Sold 8,125 USD

Sotheby's. Important Jewels, 28 Sep 10, New York www.sothebys.com