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 ...

In adamantane, the carbon atoms are in the right diamond-like arrangement, but each carbon is capped with hydrogen atoms. As ...

Sparkling diamonds and verdant emeralds are some of the most coveted and priciest gemstones. But which precious stones are rarer: diamonds or emeralds? In terms of total known deposits, emeralds are ...