Platinum And Diamond Ring, J.E. Caldwell. Photo Sotheby's

Centered by an emerald-cut diamond weighing 20.37 carats, flanked by two tapered baguette diamonds weighing approximately 1.50 carats, size 5½, signed J.E.C. & Co., numbered V470. Estimation: 300,000 - 400,000 USD 

NOTE DE CATALOGUE: Accompanied by GIA report no. 2145647777 stating that the diamond is L color, VVS2 clarity.

Sotheby's. Important Jewels. New York | 20 sept. 2012 www.sothebys.com