The rare Ocean Dream diamond sold for more than R283 million at auction, while a valuable blue diamond from South Africa’s ...

A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist sold for $17.3 million ...

Christie's says a 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist has ...

Botswana's President Mokgweetsi Masisi holds the Karowe diamond at his office in Gaborone on Thursday. [Photo/AFP] GABORONE, Botswana — A massive 2,492-carat diamond, the second largest in the world, ...

A study from UCT has found that extremely rare gem-quality diamonds, like the massive 3,106-carat Cullinan, come from areas rich in iron. These regions are located over 150 kilometres beneath Earth's ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? Here’s what you’ll learn when you read this story: The Cullinan diamond was once the ...

A rare blue diamond weighing 41.82 carats has been recovered from the Cullinan mine in South Africa, with experts saying the stone could be worth more than $40 million. The company operating the mine ...

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At the top end of the diamond market, determining value is an entirely different ballgame. Standard reference points like price lists, per-carat averages, and even traditional scarcity models cease to ...