These crystals are produced in molten rock as it travels from deep inside Earth to the surface. With increasingly sophisticated scientific methods, we can extract a secret history of volcanoes ...

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 ...

Wild Earth Rocks is where crystals sparkle, people find gifts and young geologists dream. 11-year-old Paul Stevens became intrigued by rocks when he was around 6, looking for them in his yard ...