Lot 55. A Type IIA cut-cornered rectangular-cut diamond ring weighing approximately 11.03 carats, by Van Cleef & Arpels. Estimate CHF 700,000 - CHF 900,000. Price realised CHF 1,325,000. © Christie's Image Ltd 2014

Set with a cut-cornered rectangular-cut diamond, weighing approximately 11.03 carats, to the tapered baguette-cut diamond shoulders, ring size 3¾, with French assay mark for platinum Signed Van Cleef & Arpels, no. 6.836 cs 

Accompanied by report no. 1152930927 dated 18 February 2014 from the GIA Gemological Institute of America stating that the diamond is D colour, VVS1 clarity, and a working diagram indicating that the clarity of the diamond is potentially Internally Flawless, and a Diamond Type Classification letter stating that the diamond is Type IIA 

Christie's. GENEVA MAGNIFICENT JEWELS.14 May 2014. Geneva