A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that ...

Two diamonds from South Africa’s Voorspoed mine provide a rare direct insight into the chemistry of Earth’s mantle. Although ...

Formed millions to billions of years ago, diamonds can shine light into the darkest and oldest parts of the Earth's mantle. The analysis of ancient, superdeep diamonds dug up from mines in Brazil and ...

Diamonds are the most sought-after and admired gemstones, with a sparkling brilliance that sets them apart from all other jewelry. That’s as true today, when diamonds are mined on an industrial scale, ...

A team of Chinese scientists may have cracked the secret behind the strange Canyon Diablo diamonds. Hexagonal in form rather than cubic, the process behind how these diamonds formed has, until now, ...

Washington, DC--New research from a team including Carnegie's Steven Shirey and Jianhua Wang explains how the world's biggest and most-valuable diamonds formed--from metallic liquid deep inside ...

Pink diamonds are extremely rare and coveted — a now-closed mine in Australia has been the source of 90% of the colored gemstones. Polished pink specimens of the highest grade can sell for tens of ...