Scientists led by physical chemist Rodney Ruoff of the Institute for Basic Science in South Korea published their results in the journal Nature on April 24, revealing that they can grow diamonds from scratch in 15 minutes.

Researchers have developed a novel method for creating diamonds at room temperature and without the need for an initial gem, which may greatly simplify the process of growing priceless stones in a laboratory.

The Earth's mantle, the molten zone hundreds of miles bel...