Microscopic, ugly diamonds from the Northwest Territories are illuminating how diamonds are made — and pointing to an unexpected helper in the process. A new study suggests they formed from ancient ...

Geology professor Dan Schulze calls this singular gem from the remote Guaniamo region of Venezuela the "Picasso" diamond. The blue luminescent, high-resolution image of a diamond formed over a billion ...

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

Diamonds are the hardest natural substance on Earth, but that may not necessarily be true on carbon-rich exoplanets where certain temperature and pressure conditions create an ultra-dense form of ...

A dirty, $10 diamond with a prize inside has helped reveal that there are vast quantities of water stored deep inside the Earth. The diamond formed in the "transition zone" around 410 to 660 ...