GENEVA.- An employee shows the Beau Sancy diamond, 34.98 carat, at Sothebys auction house in Zurich, Switzerland. Marie de Medici wore it at her coronation as Queen Consort of Henry IV in 1610, and now the Beau Sancy diamond is a lavish accessory owned...

This evening at Sotheby’s Geneva, The Beau Sancy, one of the most important historic diamonds ever to come to auction, sold for CHF9,042,500 ($9,699,618), almost five times the pre-sale low estimate. No less than five bidders competed for the gem in a...

Le Beau Sancy, diamant taille poire double rose pesant 34,98 carats (est. $2-4 millions). Photo Sotheby's Genève, le 28 février 2012 – SOTHEBY’S GENÈVE a l’honneur d’annoncer que le Beau Sancy, l’un des diamants historiques les plus importants jamais...