A 8.52 carats square-cut diamond ring

Set with a square-cut diamond, weighing approximately 8.52 carats, to the graduated circular-cut diamond shoulders, mounted in platinum. Est. $50,000 - $80,000 - Lot sold $92,500

With report 09000624001 dated 20 January 2009 from the HRD Antwerp Institute of Gemmology stating that the diamond is I color, VS2 clarity

With report 17492403 dated 19 September 2008 from the Gemological Institute of America stating that the diamond is K color, VS2 clarity.

Christie's. Jewels: The New York Sale. 22 April 2009. New York, Rockefeller Plaza www.christies.com Photo: Christie's Images Ltd 2009