Large crystals found in geodes and other rocks are relatively rare. Pink ChalcedonyA pink chalcedony shows off its beauty. Chalcedonies include many types of cryptocrystalline quartz gems and ...

The miners were focused on extracting valuable minerals when they noticed a glimmer of violet in the dark, rocky walls. According to TheFancyNews, as they carefully removed layers of rock ...

Geologists have found that an ancient meteorite hit Scotland 200 million years later than previously thought, which has ...

The information comes from tiny zircon crystals found inside the rocks. Unusual small stones on a beach in Iceland may help tell the story of the Roman Empire’s demise. A team of researchers ...

Iron oxide minerals are found in rocks around the globe. Some are magnetic, and some of them rust—especially when exposed to water and oxygen. These characteristics provide clues about the ...

The Sacramento Mineral Society has monthly meetings open to the public and free programs for children where they can learn about gems and earn patches and badges. There a field trips for people of all ...

Evidence for the use of rock crystal - a rare type of perfectly transparent quartz which forms in large hexagonal gems - has occasionally been found at prehistoric sites in the British Isles, but ...

The Curiosity rover identified hidden caches of the mineral siderite, which could help explain why Mars lost its habitable climate.