“A diamond is forever.” That iconic slogan, coined for a highly successful advertising campaign in the 1940s, sold the gemstones as a symbol of eternal commitment and unity. But our new research, ...

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 ...

Deep beneath our feet, colossal explosions in the mantle have, at times, blasted diamonds toward the surface in violent jets ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. Pink diamonds are some of the rarest gems you’ll find on the planet. In fact, these ...

Jeweler Harry Winston donated the famous Hope Diamond—the largest-known deep blue diamond in the world—to the Smithsonian Institution in 1958. It arrived in a plain brown package by registered mail, ...