An Art Deco Diamond and Colored Diamond Brooch. Photo: Christie's Images Ltd

Of geometric motif, set at the center with a pear-shaped fancy intense yellow diamond, weighing approximately 6.22 carats, to the single and baguette-cut diamond scrolling plaque, set with a pear-shaped yellow diamond terminal, mounted in platinum and gold, circa 1930. Estimate $80,000 - $120,000

With report 5141951333 dated 4 September 2012 from the Gemological Institute of America stating that the pear-shaped diamond, weighing approximately 6.22 carats, is fancy intense yellow, natural color, VVS2 clarity 

Christie's. Magnificent Jewels. 16 October 2012. New York, Rockefeller Plaza