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 ...

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 ...

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.

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.

Prior to the sale of the Bleu Royal, only three fancy vivid blue diamonds of more than 10 carats had even been sold at Christie's in its over 250-year history, the auction house said, with the ...

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 ...