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 ...

Diamonds are made out of carbon — highly organized carbon, that is. Geologists are still guessing how diamonds formed in the ...

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 ...

Celebrated Place Vendôme jeweler Van Cleef & Arpels collaborates with the Muséum National d’Histoire Naturelle (MNHN / National Museum of Natural History) in Paris to present the exhibition Gems ...

Provided you have ever been amazed by the shine of a diamond, then there must have been a moment when you questioned how it entered your jewelry box instead of remaining under the Earth’s surface.

When I was a kitten, I loved collecting rocks and gems. So, I was very excited to talk about your question with my friend Johannes Haemmerli. He studies minerals at Washington State University.

What is a gem? -- How gems form -- Crystals -- Classifying gems -- Physical properties -- Optical properties -- Where gemstones are found -- Mining gemstones ...