It will go on sale for between 800,000 and 1.2 million USD at Sotheby’s on April 25^th in New York. This exceptional green, clear and intense 34.40-carat Colombian emerald is expected to break a record. Another reason for this is the pedigree of its owners, three great American collectors, including the heiress Evalyn Walsh McLean who, in the early twentieth century, had it mounted as a pendant along with the “Star of the East”, a 95-carat pear diamond. She then handed it over to Cartier as the first payment for the “Hope”, that legendary blue diamond that had once belonged to Louis XIV.