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Diamonds are made out of carbon — highly organized carbon, that is. Geologists are still guessing how diamonds formed in the Earth from 1 billion to 3 billion years ago.

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. Over 70 percent of the world’s diamonds are mined from kimberlite ...

Most diamonds are made of carbon recycled over and over again between Earth’s surface and its crust. But diamonds with the deepest origins — such as the famed Hope Diamond — are made of carbon from a ...

“A diamond is forever.” That iconic slogan, coined for a highly successful advertising campaign in the 1940s, sold the gemstones as a symbol of eternal commitment and unity. But our new research, ...

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, ...

Scroll down to begin the experience. Botswana’s Jwaneng Mine sits on the edge of the Kalahari Desert, a vast expanse spanning much of southern Africa, its arid plains peppered with acacia trees and ...

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 ...

The analysis of ancient, superdeep diamonds dug up from mines in Brazil and Western Africa, has exposed new processes of how continents evolved and moved during the early evolution of complex life on ...