Sotheby's says it will accept cryptocurrency for The Enigma diamond, which could sell for $6.8 million. A reputed piece of the final frontier is slated to go on the auction block as Sotheby's ...

A billion-year-old black diamond, believed to be the largest cut diamond on Earth, is going up for auction ... that suggest they were formed at impact sites where a large asteroid fell on earth ...

A rare blue diamond that has spent the past 300 years in Europe's royal houses has been sold at auction in Geneva for ... for the content of external sites. Read about our approach to external ...