Biennale des Antiquaires: de Grisogono Acquires World’s Most Expensive Rough Diamond
de Grisogono Acquires The Constellation, the World’s Most Expensive Rough Diamond. Despite a challenging market environment, people will continue to cherish and value those objects which are truly unique and special, such as the extraordinary Constellation, the world’s most expensive rough diamond. To mark the opening of the 28th Biennale des Antiquaires, Swiss luxury jeweller de … Read more