Largest ever blue diamond to be auctioned
The largest ever blue diamond to be auctioned, the "Oppenheimer Blue", will be for sale at Christie's in Geneva on May 18. The 14.62-carat stone, rated as the clearest saturation color blue possible, is estimated to fetch $38 million to $45 million. The current record auction price for a diamond is around $45 million, paid for the 'Blue Moon' diamond.