“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 ...

The legendary diamond mines of Golconda are all gone now. Blame it on the demand for their extraordinary stones—devoid of nitrogen, their color has been described as “whiter than white” and “as clear ...

The 23.24-carat “Golconda Blue” fancy vivid blue diamond has been pulled from the May 14 Christie’s Geneva Magnificent Jewels sale. If it went to auction it would have been the largest fancy vivid ...

Diamonds aren't always colorless; they can also be blue, yellow, green and even pink. But what makes these jewels come in varied hues? After forming, diamonds need to rise to the surface very quickly ...

Christie’s will present the largest fancy vivid blue diamond to be offered at auction. Named “The Golconda Blue,” it weighs 23.24 carats and has an estimate of $35 - 50 million. It will be the ...

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 sign of profound shifts in the diamond industry. By Ashley Ahn A 9.51-carat ...

A South African blue diamond of nearly 42 carats, unearthed from the world-famous Cullinan Mine in Gauteng, looks set to break value records. This is according to Petra Diamonds Limited, the company ...

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