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Lot 337. Collection of H.S.H. Gabriela Princess zu Leiningen. A magnificent Burma sapphire and Type IIa diamond necklace, by Cartier. Estimate CHF2,000,000 – CHF3,000,000 ($2,056,818 - $3,085,227). Price realised CHF 3,245,000Photo Christie's Image Ltd 2016

The detachable pendant set with a cushion-shaped sapphire, weighing approximately 55.61 carats, a pear-shaped diamond, weighing approximately 6.05 carats, and a cushion-shaped sapphire surmount, weighing approximately 3.48 carats, to the necklace set with a continuous line of graduated pear-shaped diamonds, 1998, 37.0 cm, with French assay marks for platinum and gold, in red leather Cartier case. Signed Cartier, nos. 770099 (pendant) and 710722 (necklace)

Accompanied by report no. 16030063/1 and 2 dated 14 March 2016 from the Gübelin GemLab stating that the origin of the sapphires is Burma, with no indications of heating.

Report no. 1176529998 dated 15 March 2016 from the GIA Gemological Institute of America stating that the 6.05 carat diamond is D colour, VVS1 clarity; also with a working diagram indicating that the clarity of the diamond is potentially Internally Flawless, and a Diamond Type Classification letter stating that the diamond has been determined to be Type IIa.

Further accompanied by copy of an invoice dated 18 November 1998 from Cartier.

Superb Jewels from the Collection of H.S.H. Gabriela Princess zu Leiningen

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva