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Emerald, ruby, sapphire and diamond sautoir. Photo Sotheby's

Designed as a suite of polished emeralds and sapphire beads alternating with ruby roundels and briolette diamonds, mounted in platinum, length approximately 1000mm. Est. 85,000—125,000 CHF - Hammer Price with Buyer's Premium:  100,900 CHF

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Emerald, ruby, sapphire and diamond necklace. Photo Sotheby's

Composed of five segments set with carved leaf, calibré- and square-cut emeralds, sapphires and rubies and brilliant-cut diamonds, mounted in white gold, length approximately 400mm. Est. 21,000—31,000 CHF - Hammer Price with Buyer's Premium:  47,500 CHF

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Gem-set and diamond demi-parure, Van Cleef & Arpels. Photo Sotheby's

Comprising: a pair of ear clips and a brooch, each of paisley design, set with yellow and blue circular-cut sapphires, similarly-cut emeralds and rubies, and brilliant-cut diamonds, mounted in yellow gold, signed Van Cleef & Arpels N.Y. and numbered. Est. 20,000—30,000 CHF - Hammer Price with Buyer's Premium:  35,000 CHF

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Gem-set and diamond bracelet. Photo Sotheby's

Designed as a wide articulated band set with cabochon emeralds, rubies and sapphires, accented with brilliant-cut diamonds, mounted in yellow gold and platinum, length approximately 183mm, French import marks. Est. 17,000—25,000 CHF - Hammer Price with Buyer's Premium:  27,500 CHF

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Ruby, sapphire, emerald and diamond brooch, Bulgari, circa 1960. Photo Sotheby's

Of giardinetto design, set with sapphires and emeralds cut en cabochon, oval rubies, pear-shaped, brilliant-cut and baguette diamonds, mounted in white and yellow gold, signed Bulgari, fitted case. Est. 16,000—24,000 CHF - Hammer Price with Buyer's Premium:  26,250 CHF

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Two suites of gem-set and diamond clips, 1947 and 1948, Van Cleef & Arpels. Photo Sotheby's

Comprising: four star-shaped clips highlighted with cabochon citrines, 1947, each signed Van Cleef & Arpels or V.C.A. and numbered, French assay and make's marks; and three clips, each designed as a bee, set with oval yellow sapphires, cabochon emeralds, and single-cut diamonds, 1948, all signed Van Cleef & Arpels and numbered, French assay and maker's marks, case. Est. 8,000—12,000 CHF - Hammer Price with Buyer's Premium:  20,000 CHF

LITERATURE AND REFERENCES : Cf: Sylvie Raulet, Bijoux des années 1940-1950, Neuchâtel 1987, page 79 for an illustration of three 'Bee' clips by Van Cleef & Arpels

Sotheby's. Magnificent Jewels. 17 Nov 09. Geneva www.sothebys.com