White Gold, Diamond and Emerald Snake Ring. Photo: Courtesy Doyle New York 

18 kt., diamonds ap. 3.60 cts., ap. 13 dwt. Size 7 1/2. Diamonds: K-L-VS-SI, one nicked. Emeralds: deep rich green, included, lively. Good condition. Width 1 3/8 to 5/8". Estimate $2,000-3,000

Doyle New York. Important Estate Jewelry - Wednesday, September 21, 2011 at 10am. www.doylenewyork.com