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A set of ruby and diamond jewellery, by Jahan. Price Realized: CHF1,025,000($1,061,200). Photo: Christie’s Images Ltd 2014.

Comprising a necklace composed of a graduated fringe of horizontally and vertically-set rectangular-cut diamonds interspersed with oval-shaped rubies, the principal diamonds weighing approximately 16.39, 8.79, 7.26 and 5.99 carats, together with a rectangular-cut diamond ring, weighing approximately 22.08 carats, and a pair of ear-clips of matching design, mounted in gold, necklace 48.7 cm, ear clips 3.1 cm, ring size 9¼. Necklace and ring signed Jahan

Accompanied by five reports dated July 2014 from the GIA Gemological Institute of America stating that the 22.08 carat diamond is Y to Z colour, VS2 clarity, the 16.39 carat diamond is K colour, VS2 clarity, the 8.79 carat diamond is L colour, VVS2 clarity, the 7.26 carat diamond is K colour, VS2 clarity, and the 5.99 carat diamond is J colour, VS2 clarity

Also accompanied by report no. 76906 dated 10 October 2014 from the SSEF Swiss Gemmological Institute stating that the largest rubies are of Siam (Thailand) origin and the smallest rubies are of Burmese origin, with indications of heating and moderate to residue in fissures (4)