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A coloured sapphire and diamond ring. Photo Christie's Image Ltd 2014

Set with a cushion-shaped pink-purple sapphire, weighing approximately 27.22 carats, to the fancy-cut diamond shoulders, mounted in gold, ring size 6. Estimate CHF70,000 – CHF110,000 ($79,838 - $125,459)

Accompanied by report no. cs58686 dated 16 January 2014 from the AGL American Gemological Laboratories stating that the pink-purple sapphire is of Ceylon origin, with no indications of heating

Christie's. GENEVA MAGNIFICENT JEWELS. 14 May 2014, Genevahttp://www.christies.com/