18 karat gold, ruby, emerald and diamond brooch, Marchak, Paris. Photo: Sotheby's.

Designed as a floral spray accented by an articulated butterfly, set with round rubies weighing approximately 14.25 carats, topped by a cluster of 17 cabochon emeralds, further set with round and baguette diamonds weighing approximately 3.70 carats, signed Marchak Paris, numbered 23363A; circa 1950. Estimation 15,000 — 20,000 USD 

Sotheby's. Important Jewels. New York | 24 sept. 2013 - http://www.sothebys.com