Fawaz Gruosi, founder of jewellery company de Grisogono, shows off the Swiss jeweler's second major acquisition this year, a 404-carat rough diamond during a news conference in Paris, France, September 9, 2016. The diamond was thrown by error into a trash can after it was presented this year in Cannes and was recovered later, Gruosi announced today. REUTERS/Charles Platiau

Canadian singer Celine Dion, wearing a gown by designer James Galanos from Lily et Cie, arrives at the 79th Annual Academy Awards in Hollywood, California, February 25, 2007. Dion is wearing a dress designed by James Galanos, cuff by De Grisogono and jewelry by Van Cleef & Arpels. REUTERS/Lucy Nicholson (UNITED STATES) 

Italian actress Ornella Muti and jeweller Favaz Gruozi present a collection of black diamonds by Swiss firm de Grisogono December 10. Muti arrived in the Russian capital on Thursday to take part in the presentation.

CVI