18 Karat Gold, Silver and Gem-Set Brooch, Buccellati - Photo Sotheby's

Centered by an oval-shaped opal measuring approximately 18.4 by 15.3 mm, within openwork surrounds set with sapphires, pink tourmalines and demantoid garnets, bordered by numerous rose-cut diamonds weighing approximately .35 carat, signed Buccellati Italy, with maker's marks. Estimation: 10,000 - 15,000 USD

Sotheby's. Important Jewels. New York | 07 févr. 2013 www.sothebys.com