On November 14, Christie's Geneva will offer for sale the largest D-flawless diamond to ever hit the auction block. The 163.41-carat emerald-cut diamond was cut from a 404.20-carat rough named “4 de Fevereiro," which was discovered at Angola's Lulo mine in February 2016. It was bought by de Grisogono founder Fawaz Gruosi and unveiled to […]