Abu Dhabi A rare blue diamond valued at $20 million went on pre-auction display on Tuesday in Abu Dhabi, capital of the oil-rich United Arab Emirates. "Included in the group are the largest flawless ...

The latest blue diamond to hit the auction block certainly lives up to its namesake. The 10.03-carat Mediterranean Blue gem will be the crown jewel at Sotheby’s High Jewelry Auction this May, on ...

The 10-carat Mediterranean Blue, which will go on sale in Geneva next month, is the showpiece of a collection estimated at ...