Diamonds, among the hardest materials in the world, are formed from millions of years of geological pressure and must be extracted from mines deep in the earth. But stones with the same chemical ...

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 ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. I proposed to Popular Science assistant editor Sarah Fecht last year ...

Diamonds may be forever. But their market value? That might prove less eternal. In a sign of the times spotted by Ars Technica, you can now buy a diamond-generating machine on the Chinese online ...

Unlike natural diamonds which are created by geological processes over several thousands of years, synthetic diamonds are created within weeks in a laboratory using an artificial process. Synthetic ...

The international gem trade can be a shady business. In a quiet corner of a busy London pub, a trader, who asked to remain anonymous, tells C&EN about passing off synthetic gems, made in a ...