An employee of Christie's displays the Great Mogul Emerald and Diamond Necklace by Harry Winston, estimated between 450,000 - 640,000 CHF (Swiss Francs), in display case, during the preview of "The World of Heidi Horten" the 700 piece jewellery collection of the late Austrian billionaire Heidi Horten, at Christie's Auction House in Geneva, Switzerland, Monday, May 8, 2023. (Salvatore Di Nolfi/Keystone via AP)