Messika is preparing to reveal a necklace with the 20,46-carat Okavango Blue at Couture Week, July 6 in Paris.

‘The Mediterranean Blue’ was displayed in Abu Dhabi in April – Copyright AFP/File Jade GAO An exceptionally-rare blue diamond went under the hammer in Geneva ...

A rare blue diamond on Wednesday sold in Geneva for just over $17 million, as Sotheby’s eyed total sales in excess of $100 million at the autumn jewel auctions. The 8.01-carat “Sky Blue” diamond in a ...

WASHINGTON (Reuters) - The Hope Diamond, a rare blue diamond that is one of the world's most famous jewels, has had a complicated history, passing through the hands of monarchs and bankers and ...

It is one of the largest and rarest stones of its kind ever discovered in the African country.

A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist sold for $17.3 million on Wednesday, Christie's said, calling it a record price for a stone of ...

A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist sold for $17.3 million on Wednesday, Christie’s said, calling it a record price for a stone of ...

The auction reflects the continued strength in fancy-colored diamonds and exceptional colored gemstones at the high end of the market ...

GENEVA, May 12 (Reuters) - A flawless vivid blue diamond weighing 7.03 carats sold on Tuesday for a record 10.5 million Swiss francs ($9.49 million), the highest price paid per carat for any gemstone ...

The 8.01-carat "Sky Blue" diamond in a Cartier setting was snapped up for $17.1 million (15.9 million euros), a hike of 33 percent on the $12.8 million it sold for in 2012, said the auction house's ...