It’s a “hydrated phosphate of copper,” but you may just know it as turquoise. The blue-green mineral widely regarded as a ...

If 'The Golconda Blue' went to auction it would have been the largest fancy vivid blue diamond to have been presented at a ...

Christie’s is getting ready to present The Golconda Blue, the largest Fancy Vivid Blue Diamond ever to be offered at auction. Weighing 23.24 carats, this gemstone will headline Christie’s ...

In a sea of jewels, one particular stone has been stealing the show. A rare 10-carat Mediterranean blue diamond from South Africa was on display in an exhibit featuring $100 million worth of the ...

The previous record-holder for the most expensive blue diamond to sell at auction was the 15.10-carat Fancy Vivid De Beers Blue, which sold for $57.5 million at Sotheby’s in Hong Kong in April 2022.

The Golconda Blue diamond: A legendary gemstone steeped in royal Indian heritage is set to captivate the world stage once again. The famed Golconda Blue diamond — a 23.24-carat vivid blue marvel ...

ABU DHABI, United Arab Emirates — A rare blue diamond was on display Tuesday at an exhibition of $100 million worth of the world's rarest diamonds in the United Arab Emirates' capital ...