Christie’s and the Swiss luxury jeweler de GRISOGONO present The Art of de GRISOGONO, forming a partnership that will bring to auction the most exquisite diamonds ever offered to the market. Set into an asymmetric necklace designed by de GRISOGONO and offered on 14 November at Christie’s in Geneva, this 163.41 carat, flawless D-colour emerald-cut diamond is the largest ever to come to auction.