Fancy Intense Yellow Diamond, Diamond, Gold Ring, Monture Harry Winston. Photo Heritage Auctions

The ring centers a cut-cornered square modified brilliant fancy intense yellow diamond measuring 11.22 x 11.18 x 6.74 mm and weighing 7.05 carats, enhanced by pear-shaped yellow diamonds weighing a total of 1.91 carats, accented by full-cut yellow diamonds weighing a total of 2.73 carats, set in 18k gold, marked Monture Harry Winston, accompanied by a Certificate of Authenticity from Harry Winston. A GIA Laboratory report # 13333153, dated April 5, 2004, stating Fancy Intense Yellow, Natural color, VS1 clarity, accompanies the center diamond (surrounding diamonds not tested for origin of color). Gross weight 10.33 grams. Size: 6 (sizeable).  Estimate: $100,000 - $150,000.

Property from a Los Angeles Collector

Harry Winston:An ambitious man, Harry Winston parlayed a $2,000 investment into what is arguably regarded as the best diamond jewelry business of the 20th century. His shop opened on New York City's 5th Avenue in 1932. Harry Winston was renown for his ability to see the potential locked within a diamond. He often purchased jewelry solely for the purpose re-cutting major diamonds. He is famous for cutting many of the world’s most spectacular diamonds, such as the Jonker and the Taylor-Burton. Winston donated three very famous diamonds to the Smithsonian museum: the Oppenheimer, the Hope, and the Portuguese. Often referred to as the "King of the Diamonds", he owned one-third of the world's most famous diamonds at one time. Harry Winston died in 1978. The business continues to operate select cities across the U.S. and abroad. . Jewelry Designer

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