GENEVA, SWITZERLAND - MAY 11: The red cross diamond is seen as the World's largest diamond 'The Rock', which is 228,31 carat, is sold for 18.7 Swiss francs ( 18.8 million US Dollars) at Christie???s auction house in Geneva, Switzerland on May 11, 2022. Business people, collectors competed with bids to get World's largest diamond at the auction. Omer Faruk Yildiz / Anadolu Agency/ABACAPRESS.COM