Swiss luxury jewelry and watches company de Grisogono has acquired the world’s most expensive rough diamond, the brand announced today at the opening of the Biennale des Antiquaires antique show ...

The most expensive diamond ever sold per carat until now was the Oppenheimer Blue diamond, which sold at a hammer price of $51.3 million and came in at 14.62 carats, or $3.5 million per carat ...

The most expensive diamond ever sold continues to be the 59.6-carat CTF Pink Star, which sold in 2017 for $71.2 million, according to Sotheby’s. Contributing: The Associated Press ...

Explore the world's most expensive diamonds like the priceless Kohinoor, the $400M Cullinan, and the legendary Hope Diamond.

DMCC – the world’s flagship Free Zone and Government of Dubai Authority on commodities trade and enterprise – announced today that an exceptional 100+ carat rough diamond was successfully ...

The diamond will likely become the most expensive gemstone ever sold. ... In 1999, miners in South Africa uncovered a rough 132-carat pink diamond that was later named The Pink Star.

Geneva — An exceptionally rare blue diamond went under the hammer in Geneva Tuesday, selling for almost $44 million, making it one of the most expensive diamonds ever sold at auction, Christie's ...

Only around 20 per cent of rough diamonds will be part of diamond jewellery, and new rough is seldom available. ... the world’s most expensive rough diamond.