Diamond, Platinum, White Gold Brooch, Van Cleef & Arpels. Photo Heritage Auctions

The brooch features pear-shaped diamonds weighing a total of 7.22 carats, enhanced by marquise-shaped diamonds weighing a total of 7.94 carats, accented by by full-cut diamonds weighing a total of 5.14 carats, further enhanced by baguette-cut diamonds weighing a total of 2.69 carats, set in platinum, completed by an 18k white gold double pinstem, marked Van Cleef & Arpels, reference number 16499. Gross weight 25.90 grams. Dimensions: 2-7/8 inches x 1-7/8 inch Estimate: $20,000 - $30,000.

Heritage Auctions. 2013 April 29. Jewelry Signature Auction - New York - http://jewelry.ha.com