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A gold brooch of urchin design set with aquamarine and diamonds, with matching ear clips. by Tiffany & Co. American, circa 1950. Price on request. Courtesy Sandra Cronan Ltd.

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A large aquamarine briolette and pendant suspended on a long pave diamond set chain. the necklace can be split into various length necklaces and bracelets. mounted in platinum, English, circa 1910Price on request. Courtesy Sandra Cronan Ltd.

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An Art Deco bracelet set with cabochon emeralds, diamonds and framed with calibre cut onyx. mounted in platinum. American, circa 1925.signed MarcusPrice on request. Courtesy Sandra Cronan Ltd.

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A pair of carved emerald, ruby and diamond Tutti Fruti clips, mounted in platinum. By Mauboussin. Paris, circa 1925Price on request. Courtesy Sandra Cronan Ltd.

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Paris Boucheron. An important peacock feather necklace by Boucheron with Royal Russian provenance. Set with a sapphire, emeralds and diamonds, the feather is detachable and may be worn as a brooch or hair ornament. Paris, 1883. Price on request. Courtesy Sandra Cronan Ltd.

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Fouquet. Art Deco carved ivory brooch, studded with cabochon turquoise, calibre cut onyx and 18ct yellow gold, having a turquoise drop surmounted by a diamond. French, 1922-1923. Price on request. Courtesy Sandra Cronan Ltd.

Masterpiece London 2016. 30 june- 6 july. SANDRA CRONAN LTD. Stand D1516 Albermarle Street, Bartley Way, London, W1S 4HW, United Kingdom. T  +44 20 74 91 48 51 - E-mail enquiries@sandracronan.com - Website http://www.sandracronan.com