epa11331046 A Sotheby's employee displays a 'Magnificent' unmounted diamond, a round-cornered square brilliant-cut diamond weighing 37.61 carats, during a preview at Sotheby's in Geneva, Switzerland, 10 May 2024. The diamond is estimated to sell between 1,460,000 and 2,370,000 Swiss Francs. The auction will take place in Geneva on on 14 May. EPA/MARTIAL TREZZINI