FILE - In this May 2, 2012, file photo, an employee shows the Beau Sancy diamond, 34.98 carat, at Sotheby's auction house in Zurich, Switzerland. In May, Sotheby’s sold the 34.98 carat Beau Sancy diamond to an anonymous bidder for $9.7 million. Marie de Medici had wore it at her coronation as Queen Consort of Henry IV in France in 1610. Then the diamond passed among the royal families in France, England, Prussia and the Netherlands. It was sold by the Royal House of Prussia. (AP Photo / Keystone, Alessandro Della Bella, File)

Associated Press
FILE - In this May 2, 2012, file photo, an employee shows the Beau Sancy diamond, 34.98 carat,  at Sotheby's auction house in Zurich, Switzerland. In May, Sotheby’s sold the 34.98 carat Beau Sancy diamond to an anonymous bidder for $9.7 million. Marie de Medici had wore it at her coronation as Queen Consort of Henry IV in France in 1610. Then the diamond passed among the royal families in France, England, Prussia and the Netherlands. It was sold by the Royal House of Prussia. (AP Photo / Keystone, Alessandro Della Bella, File)
FILE - In this May 2, 2012, file photo, an employee shows the Beau Sancy diamond, 34.98 carat, at Sotheby's auction house in Zurich, Switzerland. In May, Sotheby’s sold the 34.98 carat Beau Sancy diamond to an anonymous bidder for $9.7 million. Marie de Medici had wore it at her coronation as Queen Consort of Henry IV in France in 1610. Then the diamond passed among the royal families in France, England, Prussia and the Netherlands. It was sold by the Royal House of Prussia. (AP Photo / Keystone, Alessandro Della Bella, File)
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