'Oppenheimer Blue' diamond sets new record, fetches $57 million

[caption id="attachment_852608" align="aligncenter" width="1024"] Image courtesy of Christie’s.[/caption] The “Oppenheimer Blue” diamond has sold for more than $57 million (56.8 million Swiss francs) including fees, crushing the previous record for the most expensive diamond ever sold at auction. The 14.62-carats...