Dubbed the 'Ocean Dream', the diamond was discovered in its rough form in Central Africa in 2002. The original crystal weighed a whopping 11.17 carats, before it was cut down to preserve and maximise ...

The 5.5-carat triangular-cut gemstone shattered records at Christie’s Geneva, more than doubling its previous auction price. Graded as the largest fancy vivid blue-green diamond by the GIA, this ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the world's rarest diamonds is about to be sold to the highest bidder. The five-and-a-half carat fancy vivid blue-green ...

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 ...