A diamond ring by Bulgari. Photo Christie's Image Ltd 2007

Set with a rectangular-cut diamond, weighing approximately 24.65 carats, flanked on either side by tapered baguette-cut diamonds, mounted in platinum. Signed Bulgari. Estimate $1,500,000 - $2,000,000. Price Realized $2,056,000

With report 15692758 dated 29 January 2007 from the Gemological Institute of America stating that the diamond is D color, VVS2 clarity; accompanied by a working diagram indicating that the clarity may be potentially internally flawless

Christie's. MAGNIFICENT JEWELS, 25 April 2007, New York, Rockefeller Plaza - www.christies.com