GENEVA -- A blue diamond weighing nearly 10 carats has sold at auction in Switzerland for 20.5 million Swiss francs ($26.6 ...

A 9.51-carat blue stone that once belonged to the heiress Bunny Mellon sold for $7 million less than at its last auction, a ...

The Christie’s Geneva Magnificent Jewels auction at the Four Seasons Hotel des Bergues achieved more than $75.8 million.

The discovery comes as the jewelry trade promotes off-color diamonds—like brown and champagne—as stylish, affordable ...

An Oklahoma family finds a 2.79-carat brown diamond at Crater of Diamonds, Arkansas, during a birthday celebration stop. Luck ...

A nearly 10-carat blue diamond was sold at an auction in Switzerland on Tuesday for 20.5 million Swiss francs ($26.6 million) ...

Unsure about the authenticity of your diamond? Learn how to perform 5 easy, non-destructive tests at home using simple items ...

Ginza Diamond Shiraishi Hong Kong today announced the implementation of an updated design and production framework for its ...

Explorers find evidence of a rare green diamond in Finland, with minerals pointing to its origin hidden beneath the ice.

Eighty students from seven Virginia colleges tackled NASA-inspired challenges in Hampton, showcasing regional innovation at ...