The move is part of a broader renewal effort led by chief executive officer Céline Assimon.
Sotheby’s had hoped to set a new record with the 37.3-carat Raj Pink, the centerpiece of its sale in Geneva.
The stone went to an unnamed bidder at a Christie’s sale in Geneva.
Exclusive pictures inside the De Grisogono party during Cannes Film Festival. Photos of Rita Ora, Pamela Anderson, Hailey Baldwin and more.
DLK’s David and Lisa Klein have struck a U.S. partnership with De Grisogono, and will close their own brand Leviev in the process.
Georgina Brandolini organized the event, which drew guests including Jason Basmajian and Becca Cason Thrash.
Posing as a client, the suspect stole two rings and two diamonds during an appointment at the De Grisogono showroom in Paris.
De Grisogono, Nirav Modi, Cindy Chao The Art Jewel and Boghossian were the only jewelers in attendance this edition.
The Geneva-based jeweler celebrated its return to the Biennale des Antiquaires in Paris by presenting the 813-carat Constellation.
The reality star did not let a red carpet wardrobe malfunction dampen her spirits at the jeweler’s annual party.