Diamonds are made out of carbon — highly organized carbon, that is. Geologists are still guessing how diamonds formed in the ...

A new study indicates that Mercury's core-mantle boundary (CMB) may possess a diamond layer that extends up to 18 kilometers ...

In the simplest terms, diamonds are carbon with a cubic atomic arrangement, and their shine comes from the gems’ high refractive index—that is, an ability to bend light. Diamonds are full of ...

Once the diamonds are brought to the surface and cooled relatively quickly, those carbon atoms are locked into place and there's just not enough energy to now start rearranging them into graphite.

Diamonds are a girl's best friend, but these diamonds will have eco-friendly enthusiasts swoon. The most valuable gemstone ...

According to the study, at depths where pressures surpass 5.5 gigapascals and temperatures near 3,600°F, this buried carbon could have converted into diamond at the boundary between the core and ...

NASA researchers suggest a surprising discovery on planet Mercury: a diamond layer approximately 10 miles thick, adding to ...