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A pair of art deco 'groseillier' cultured pearl ear clips and brooch, by René Boivin. photo image 2009 Christie's Ltd

Comprising a brooch, of bombé design set with five graduated lines of cultured pearls each with central boule detail; and a pair of ear clips en suite, circa 1940, brooch 4.4 cm and ear clips 2.5 cm long, with French import marks for silver and gold. Signed R.Boivin (2) Estimate CHF20,000 - CHF30,000 ($19,763 - $29,644)

Notes: Cf. Françoise Cailles, René Boivin Joaillier, les Editions de l'Amateur, 1994, cover and page 86, for a 'Groseillier' clip made in 1937, designed by Juliette Moutard.

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A pair of gold, moonstone and aquamarine ear clips, by René Boivin. photo image 2009 Christie's Ltd

Each designed as a pavé-set aquamarine starfish with cabochon moonstone collets, 4.5 cm wide, with French assay mark for gold, in a Boivin beige suede case. Signed R. Boivin - Estimate CHF20,000 - CHF25,000 ($19,763 - $24,703)

Notes: Cf. Françoise Cailles, René Boivin Joaillier, les Editions de l'Amateur, 1994, page 276

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A gold, ruby and diamond "coulissant" necklace, by René Boivin. photo image 2009 Christie's Ltd

Of torc design, the front set with three brilliant-cut diamond and circular-cut ruby bombé panels with moveable gold rondelle spacers, to the polished gold collar, mounted in 18k gold, white gold and blackened silver, 1975, 36.2 cm inner circumference, in a René Boivin brown suede pouch. Signed R. Boivin - Estimate CHF15,000 - CHF20,000 ($14,822 - $19,763)

Accompanied by a letter of authenticity dated 10 February 2008 from Françoise Cailles stating that the necklace was made by René Boivin in 1975

1

A gold, silver and gem-set elephant pendant, by René Boivin. photo image 2009 Christie's Ltd

The head decorated with a multi-coloured sapphire and ruby headdress with yellow sapphire tassel detail, the polished gold body with silver tusks and feet to the gold link backchain, 5.3 cm long, with brooch fittings, with French assay marks for silver and gold. Signed René Boivin (2) - Estimate CHF10,000 - CHF15,000 ($9,881 - $14,822)

Notes : Cf. Françoise Cailles, René Boivin Joaillier, les Editions de l'Amateur, 1994, page 356

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A gold and gem-set 'poisson' pendant, by René Boivin. photo image 2009 Christie's Ltd

The articulated gold fish with ruby, emerald and diamond-set head and cabochon moonstone eyes to the gold link chain, pendant 8.9 cm long, chain with French assay mark for gold. By René Boivin (2) - Estimate CHF5,000 - CHF7,000 ($4,941 - $6,917)

Notes: Cf. Françoise Cailles, René Boivin Joaillier, les Editions de l'Amateur, 1994, page 354

Christie's. Jewels : The Geneva Sale. 18 November 2009. Geneva - Four Seasons Hotel des Bergues www.christies.com