A new study of sapphires found in volcanic fields in Germany reveals that these beautiful blue stones form where magma and rocks from Earth's crust mix. When you purchase through links on our site, we ...

Star clusters are collections of thousands to millions of stars bound together by gravity — and many can be observed in the night sky with binoculars or a small telescope. One notable example is ω ...

Diamonds seem to reach Earth's surface in massive volcanic eruptions when supercontinents break up, and they form when continents come together. When you purchase through links on our site, we may ...

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 ...

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.

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

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.

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