A big, beautiful diamond. Sure, it catches light like no other gem, and it's the hardest material on Earth, and it's worth an awful lot of money. But what is it really but a collection of ordinary ...

The Foxfire - a two-billion-year-old 187.7-carat diamond unearthed at the Diavik mine - was displayed around the world ... latest find "tops the list" of beautiful diamonds.

A billion-year-old black diamond, believed to be the largest cut diamond on Earth, is going up for auction. There are competing theories about the origins of the gem, named The Enigma, including ...

On Earth, diamonds are considered precious partly because they're fairly rare: The planet 's diamond content is about .001%. But on other planets in the universe, diamonds may be as common as ...