1 / 5
The Beau Sancy, a 34.98 carat diamond that will be put on sale by Sotheby's auction house in Geneva next month, is presented in Paris, Monday April 23, 2012. The Beau Sancy diamond, a stone of historical importance with a royal provenance stretching back to Marie de Medicis is estimated between two and four million dollars, (1.5 to 3 million Euros).(AP Photo/Remy de la Mauviniere)
The Beau Sancy, a 34.98 carat diamond that will be put on sale by Sotheby's auction house in Geneva next month, is presented in Paris, Monday April 23, 2012. The Beau Sancy diamond, a stone of historical importance with a royal provenance stretching back to Marie de Medicis is estimated between two and four million dollars, (1.5 to 3 million Euros).(AP Photo/Remy de la Mauviniere)A centuries-old diamond passed down through generations of European royalty fetched nine million Swiss francs ($9.7 million) at auction in Geneva on May 15. The 35-carat "Beau Sancy" diamond was worn by Marie de Medici, Queen consort of Henry IV, at her coronation in 1610.