Cartier. An Important Art Deco Diamond and Aquamarine Brooch, 1910. Photo Phillips.

Designed as an open-work pavé-set diamond plaque enhanced by step-cut diamonds, centering upon a rectangular-cut aquamarine weighing approximately 10.00 carats and a pear-shaped diamond weighing approximately 1.85 carats, mounted in 18K white gold, length 1 3/4 inches. Signed 'Cartier Paris', no.41004 Estimate $30,000 - 40,000

Phillips. JEWELS NEW YORK 30 APRIL 2014 10AM - http://phillips.com/