Messika is preparing to reveal a necklace with the 20,46-carat Okavango Blue at Couture Week, July 6 in Paris.

It is one of the largest and rarest stones of its kind ever discovered in the African country.

“This is the most famous blue diamond that's coming up for sale for the first time ever in over 100 years.” :: The boron in this diamond gives it its blue color and also makes it electro-conductive ...

Blue diamonds are among the most rare and valuable gems on Earth, but up until now, scientists knew very little about them. The most famous blue diamond is the Hope Diamond, which was discovered in ...

An exceptionally rare blue diamond went under the hammer in Geneva late Tuesday, selling for $21.5 million, Sotheby's auction house said. "The Mediterranean Blue," a fancy vivid blue diamond weighing ...

The auction reflects the continued strength in fancy-colored diamonds and exceptional colored gemstones at the high end of the market ...

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. Using tiny ...

This 15.1-carat fancy vivid blue diamond will be auctioned at Sotheby's Hong Kong in April. Courtesy of Sotheby's A 15.1-carat fancy vivid blue diamond is projected to be auctioned for a whopping $48 ...

Sotheby’s and Christie’s will auction a strong collection of rare and important gemstones in New York just in time for the holidays, with both featuring a blue diamond ring as the top lot. On Dec. 4, ...

Diamonds have a lot going on. Besides their sought-after clarity, extreme hardness, and entanglement in civil wars, diamonds tell unique geologic stories. Contrary to the convenient idea that they are ...