Diamonds that formed deep below the Earth's surface are revealing the secrets of an ancient supercontinent that existed hundreds of millions of years ago. A study of these "super-deep" diamonds has ...

Paving the way to a dry process with less environmental impact Tools coated with diamond film (diamond-coated tools) are used for difficult-to-machine materials such as CFRP. In the manufacture of ...

Molten carbon can form into either diamond or graphite. A new study shows how graphite can sometimes form even under conditions that should lead to diamond. (Getty Images) The graphite found in your ...

The rarity of precious gemstones comes down to the geologic process of their formation. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Sparkling ...

A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that form in completely opposing chemical environments—a combination so unusual ...

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 rough diamond unearthed in Botswana in the final quarter of 2025 has drawn sustained attention from geoscientists and ...

The graphite found in your favorite pencil could have instead been the diamond your mother always wears. What made the difference? Researchers are finding out. How molten carbon crystallizes into ...

Molten carbon can crystallize into diamond or graphite, but it has been difficult to study this process. New simulations show that graphite can sometimes "hijack" the pathway that would lead to ...