Nemesis International, a Dubai-based diamond trading company, on Thursday revealed the world's largest 'D coloured' diamond ever certified by GIA. The emerald cut diamond is priceless. The reveal was held during DMCC's fourth edition of its highly anticipated Dubai Diamond Conference (DDC). The diamond comes from the world's most valuable rough diamond, 'The Constellation', with a weight of 812.77 carats and record purchase price of $63 million. The evaluation, maping ...