epa11331038 A Sotheby's employee displays 'The Allnatt', a round-cornered square brilliant-cut fancy vivid yellow diamond weighing over 100 carats, during a preview at Sotheby's in Geneva, Switzerland, 10 May 2024. The diamond is estimated to sell between 5,600,000 and 6,500,000 Swiss Francs around 5,700,000 and 6,650,000 euros). The auction will take place in Geneva on on 14 May. EPA/MARTIAL TREZZINI