Diamond Devant De Corsage © Sotheby's

This piece, signed by Vever, circa 1900, has remained in the same family collection for a century and is one of the most important pieces of French Belle Époque jewelry to come to the market in many years. It sold for 777,000 Swiss francs ($740,263). Designed as an articulated floral branch, it is set with cushion-shaped, circular and rose cut diamonds, the flower heads set en tremblant, mounted in silver, yellow and pink gold. It is from the Estate of Henriette de l'Espine, S.A.S. la Princesse Louis de Croÿ.