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A set of ruby and diamond jewellery, by Harry Winston, and a diamond necklace. Photo Christie's Image Ltd 2014.

Comprising a brooch, centering upon an oval-shaped ruby, weighing approximately 13.12 carats, within three rows of graduated brilliant-cut diamonds, mounted in platinum, 4.6 cm, a pair of ear clips, each set with an oval-shaped ruby, weighing approximately 11.20 and 10.48 carats, within a double row of graduated brilliant-cut diamonds, mounted in platinum and gold, 2.8 cm, and a necklace designed as five rows of brilliant-cut diamonds, can detach to be worn as two bracelets, as a necklace 39.5 cm, as two bracelets 18.0 cm each. The brooch and pair of ear clips with maker's mark for Jacques Timey and signed Winston for Harry Winston. Estimate CHF480,000 – CHF600,000 ($545,972 - $682,464)

Accompanied by report no. 72715 dated 14 February 2014 from the SSEF Swiss Gemmological Institute stating that the 13.12 carat ruby is of Thai origin, with indications of heating

Report no. 72714 dated 14 February 2014 from the SSEF Swiss Gemmological Institute stating that the 11.20 carat ruby us of Thai origin, with indications of heating

Report no. 72713 dated 14 February 2014 from the SSEF Swiss Gemmological Institute stating that the 10.48 carat ruby is of Thai origin, with indications of heating and minor residue in fissures (3)

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014. Geneva - www.christies.com