A Rectangular-Cut Diamond Ring, by David Webb. Photo: Christie's Images Ltd 2012

Set with a modified rectangular-cut diamond, weighing approximately 22.46 carats, flanked on either side by a trillion-cut diamond, mounted in platinum. Signed Webb for David Webb - Lot 185. Estimate $1,200,000 - $1,800,000

With report 1142601256 dated 9 April 2012 from the Gemological Institute of America stating that the diamond is E color, VS2 clarity 

“A colorless diamond of over 20 carats polished to perfection is already a very rare gem. These attributes coupled with the prestige of the David Webb name make this is a spectacular jewel for serious diamond connoisseurs.” – Rahul Kadakia, Head of Jewelry Department

Christie's. New York Important Jewels. 12 June 2012. New York, Rockefeller Plaza