Sapphire, Diamond, Platinum Ring, Monture Harry Winston. Photo Heritage Auctions

The ring centers a cushion-shaped sapphire measuring 12.86 x 12.54 x 10.65 mm and weighing 16.11 carats, enhanced by marquise-shaped diamonds weighing a total of 0.83 carat, accented by pear-shaped diamonds weighing a total of 2.44 carats, set in platinum, marked 'Monture Harry Winston'. A GIA Laboratory report # 5151209638, dated January 31, 2013 stating Natural Corundum, Indications of Heating, Madagascar Origin, accompanies the sapphire. Gross weight 14.45 grams. Size: 6 (sizeable) - Estimate: $60,000 - $80,000

Property from a Los Angeles Collector

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