A fine pear-shaped diamond ring. Photo: Christie's Images Ltd., 2010

Set with a pear-shaped diamond, weighing approximately 12.32 carats; accompanied by a ring, designed as a baguette-cut diamond band, mounted in platinum, baguette-cut diamond band, size 6 - Estimate $1,000,000 - $1,500,000. Price Realized $1,314,500

With report 2125193294 dated 26 May 2010 from the Gemological Institute of America stating that the pear-shaped diamond is D color, internally flawless clarity (2)

Christie's. Jewels: The New York Sale Including the JAR Imperial Topaz, Ruby and Diamond Ear Pendants, The Bulgari Blue, Jeweled Elegance & the Vanderbilt Diamond Necklace, 20 October 2010, New York, Rockefeller Plaza www.christies.com