Pure White Natural Quartz Crystal Geode Cave, Atlas Mountains, AfricaSourced from the Atlas Mountains in North Africa, this Pure White Natural Quartz Crystal Geode, has exceptional clarity and stunning textured rock exterior patina. Geodes are formed when there is a pocket of air in a piece of rock, usually in the midst of a volcanic eruption. As the volcanic lava cools, the pockets of air will present as bubbles. This is one way in which a geode can classically be formed after an eruption. This particular Geode has