Add Yahoo as a preferred source to see more of our stories on Google. They don’t make them like they used to — at all. It can take natural diamonds over three billion years to grow, but researchers in ...

Diamonds form deep within the Earth's mantle, around 250 kilometers below the surface, where immense pressure (up to 10 GPa) and temperatures (around 2,200 °C) compress carbon into diamonds over ...

Researchers have succeeded in creating a rare type of diamond, known as lonsdaleite or hexagonal diamond. This material, whose hardness could surpass that of conventional diamonds, opens new ...

A team of researchers has reported the first laboratory synthesis and recovery of bulk hexagonal diamond, a crystal form long predicted to be harder than the conventional gems used in cutting tools ...

South African diamonds have revealed nickel-rich metallic inclusions, offering the first direct evidence of reactions predicted to occur deep in Earth’s mantle. The study shows how oxidized melts ...

Diamonds are chemically similar to another form of carbon, graphite, which is dark, soft and conducts electricity. In ...

Diamonds are the most sought-after and admired gemstones, with a sparkling brilliance that sets them apart from all other jewelry. That’s as true today, when diamonds are mined on an industrial scale, ...

Earth may owe its supply of pink diamonds to the breakup of the planet's first supercontinent. The Argyle formation in western Australia is the source of 90% of pink diamonds on Earth. It's an odd ...

Curtin University researchers studying diamond-rich rocks from Australia's Argyle volcano have identified the missing geological process needed to bring valuable pink diamonds to the Earth's surface ...