Blue diamonds are among the most rare and valuable gems on Earth. Their telltale color comes from small amounts of boron that were locked into their crystalline structures when they first formed.

Blue diamonds come from ocean floor that is pushed nearly to Earth’s core The Hope Diamond is rare evidence that the Earth recycles. Scott K. Johnson – Aug 1, 2018 3:54 pm ...

GENEVA — A large blue diamond, one of the world’s rarest, could fetch $35 million to $55 million at auction next week, Sotheby’s said Wednesday, as an industry group reported strong pri… ...

The Okavango Blue Diamond, a dazzling 20.46-carat stone, is more than just a beautiful jewel-it's practically a miracle of nature. Unearthed from the Orapa mine in Botswana, this rare gem has ...

Where blue diamonds come from is a question that’s eluded scientists for centuries. But now, secrets of the scarcest stones in the world are coming to the surface.

Rare "Blue Moon" diamond sells for record $48 million at auction 00:27. Joseph Lau was the top bidder for the 12.03-carat "Blue Moon" diamond that sold Wednesday night for a record-setting 48.6 ...

The Hope Diamond, a rare blue diamond that is one of the world's most famous jewels, has had a complicated history, passing through the hands of monarchs and bankers and heiresses and thieves ...

Blue diamonds, among the rarest gems on Earth, are born deep inside the planet’s mantle. Yet their blue hue comes from boron, an element far more abundant in Earth’s crust than its mantle.

Fancy vivid blue diamonds rose in value 8.5% in the past 12 months. Meanwhile, all yellow fancy color diamonds appreciated 1.6%, and all pink fancy color diamonds rose by 0.5% during the same ...

The “Blue Moon of Josephine” is a 12.03 carat blue diamond that sold for $48.4 million in 2015.It still holds the auction record for the price-per-carat of any diamond or gemstone, the press ...

On Tuesday, Botswana premiered a blue diamond that could outstrip the storied Hope Diamond: the 20.46-carat, close-to-flawless Okavango Blue.