Antique Gold, Diamond and Natural Pearl Butterfly Brooch. Photo Doyle

The body centering one old-mine cut oval diamond, topped by one pearl, flanked by one pear-shaped natural pearl approximately 11.0 x 8.63 mm., the wings and antennae set throughout with 79 old-mine cut diamonds, totaling approximately 4.00 cts., accented by rose-cut diamonds, approximately 9.8 dwts. Estimate $6,000-8,000

With GIA report no. 1152201624 stating that the pearl is natural, saltwater, no indications of treatment.

Doyle New York. Important Jewelry - Monday, April 15, 2013 at 10am. http://www.doylenewyork.com