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?

Man cuts a drumstick shaped geode in half to reveal crystals on the inside! Supreme Court Rules Courts Don't Have Power in Some Immigration Cases Garfield by Jim Davis Brain bleed sent Jamie Foxx ...

Read more: 25 Gorgeous Islands For Vacationing That Won't Break The Bank Inside the world's largest geode, which can contain ...

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 ...