The Azure Blue is one of two important blue diamonds being offered at Christie’s. The second is a 5.04-carat fancy vivid blue diamond Its estimate is $6.5 to $8.5 million ...

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

The triangular-cut blue-green stone has a color so improbable that, as the Gemological Institute of America notes in its ...

"Ocean Dream," the largest blue-green diamond ever recorded, sold for $17 million Wednesday, Christie's auction house said. It was sold for 13.6 million Swiss francs ($17.3 million), a new record for ...

GENEVA (AP) — A blue diamond weighing nearly 10 carats has sold at auction in Switzerland for 20.5 million Swiss francs ($26.6 million) including fees. Today in History: May 20, white mob attacks ...

PARIS — A 17.61-carat fancy vivid blue diamond sold Tuesday for $44 million — a high price, but short of its highest estimate. An anonymous bidder scooped up the stone, dubbed Bleu Royal, in just ...

If you’re feeling blue, Christie’s has just the gem. The auction house is offering an extraordinarily large 31.62-carat blue diamond at the Magnificent Jewels sale in New York this June. The aptly ...

GENEVA, Switzerland — “Ocean Dream,” the largest blue-green diamond ever recorded, sold for $17 million on Wednesday, ...

Forbes contributors publish independent expert analyses and insights. Kate Matthams Spencer is a Paris-based writer who covers jewelry. A 41.28ct, ice-blue diamond has been unearthed at the famous ...

Botswana has unveiled a blue diamond whose value could outstrip that of the storied Hope Diamond: the 20.46-carat, close-to-flawless Okavango Blue. The diamond was presented in Gaborone, Botswana by ...