How many different crystals and minerals can you find? Break the geode open and discover what Nature createdover 25 million years ago. You will be the first person ever to see these mineral and crystals. There are many good references to help you learn about the interesting world of rocks and minerals. Every Geode is different! Place geode in a bag and tap lightly with a hammer. Take care when opening so you don't loose any of the crystals.