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 ...

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 ...

In an age when you can get just about anything online, it’s probably no surprise that you can buy a diamond-making machine for $200,000 on Chinese eCommerce site Alibaba. If, like me, you haven’t been ...

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

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 ...