Cutting a 404-Carat Diamond

07/07/2016 12:06

How does one cut a massive, 404-carat diamond? James Tarmy of Bloomberg discusses the strategy behind cutting the 404-carat diamond that Lucapa Diamond discovered in Angola’s Lulo mine, making it the largest diamond ever found in Angola. It is also the 27th biggest recorded diamond in the world and the biggest diamond ever discovered by an Australian company.  Nikolas Polka, CEO of diamond consortium Nemesis International bought the rough stone and turned to Fawaz Gruosi, founder and creative director of De Grisogono, a Geneva-based jeweler. Despite advancements in 3D-imaging technology, both the owner and jeweler were unsure of how they should cut the diamond, or even what they’d find once they made the first incision. Tarmy explains that in such case it is in fact the diamond that determines what one can do with it. The polishers will cut several windows at different angles “to plot the imperfections.” After that, they will use a computer to assess imperfections and plot the optimal series of cuts. After the first cuts, Gruosi will spend several weeks imaging the diamond, make more incisions and then, after a three- or four-month-long process, plus a review by the Gemological Institute of America, the diamond - or diamonds - will be polished, set, and ready for sale by the end of this year. The Lulo Project is a partnership between Lucapa, state miner Endiama and Rosas & Pétalas.