Environment This rare blue diamond is practically a miracle of nature It’s also helping geologists better understand plate tectonics. Elana Spivack Nov 15, 2021 1:15 PM EST ...

The world’s largest blue diamond ever to come to auction has sold for 450,925,000 HKD, or $57.5 million. Named “The De Beers Cullinan Blue,” the massive 15.10-carat step-cut gem sold at ...

GENEVA -- The " Oppenheimer Blue" diamond sold Wednesday for more than 56.8 million Swiss francs ($58.2 million) including fees, setting a new record for the per-carat price for a diamond.

Big Number $57.5 million. That’s how much the 16.63-carat Oppenheimer Blue, sold for at auction in 2016. It holds the record for the most expensive blue diamond.

In turn, establishing that blue diamonds are “super-deep” allowed scientists to say that blue diamonds had to grow within oceanic plates forced down by ancient plate tectonic movement.

The diamond is thought to have come from around 668 kilometers (415 miles) below the ground, reports PopSci. This depth is a place where boron isn’t that common, and yet the Okavango diamond is ...

The world's largest blue diamond now has a price tag to match its rarity. The 15.10-carat diamond, called "The De Beers Cullinan Blue," sold for $57.5 million Wednesday in an auction at Sotheby's ...

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 ...