When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A rare type of diamond may suggest that water can penetrate deeper into Earth's interior than ...

Experts explain how this element plays a key role in the price and appearance of your sparkler.

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 ...