The extremely rare, 10-carat Mediterranean Blue diamond could fetch a whopping $20 million at Sotheby's High Jewelry auction ...

The De Beers diamond cartel, which has its Central Selling Organization in London and its production fields in Africa, has opened a discreet but energetic campaign to promote the glitter of ...

"The Mediterranean Blue" will be auctioned by Sotheby’s this Spring in Geneva with a classification representing less than ...

A stunning blue fancy colour diamond is expected to impress collectors at an upcoming sale, entering the auction with an eye-popping pre-sale estimate.

Blue is beautiful when it comes to diamonds. Two of the top three to have fetched the highest prices for coloured diamonds at auction are “fancy vivid” examples – the top spot still belongs ...

Mediterranean Blue, a 10.03-carat blue diamond, will be revealed to the public for the first time at Abu Dhabi’s Bassam ...