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Lot 223. A 10.15 carats rectangular-cut diamond ring, by GraffEstimate $500,000 – $700,000. Photo Christie's Image Ltd 2016.

Set with a rectangular-cut diamond, weighing approximately 10.15 carats, flanked on either side by a tapered baguette-cut diamond, ring size 6 1/4, mounted in platinum, in a Graff navy leather case and outer box. Signed Graff, no. GR12657

Accompanied by report no. 13335922 dated 3 March 2016 from the GIA Gemological Institute of America stating that the diamond is F color, VVS2 clarity 

Christie's. MAGNIFICENT JEWELS & THE JUBILEE RUBY, 20 April 2016, New York, Rockefeller Plaza