White and Yellow Gold, Sapphire and Diamond Ring, Mario Buccellati. Photo Doyle New York

18 kt., centering one oval sapphire approximately 3.25 cts., framed in textured gold, within a white gold mounting of delicate lacework, accented by 36 round diamonds approximately .65 ct., completed by a finely ribbed white gold shank, signed M. Buccellati, Italy, approximately 6 dwts. Size 6 1/4. Estimate $18,000-24,000 

Doyle New York. Important Jewelry. Wednesday, September 25, 2013. http://www.doylenewyork.com