Evacuations are underway after Mount Kanlaon in the central Philippines erupted for the second time this year, sending a ...

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in the world. But what exactly is a geode and how do crystals form inside them?

An Aussie man has revealed an incredible 450 million-year-old discovery he made in a secret creek in the outback. Terry Hearl ...

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 ...