This product is a 22.5 lb fossilized Indiana geode quartz crystal with an agatized crinoid calyx. It is a unique piece of natural history that showcases the beauty of fossils and crystalized formations. The geode contains stunning crystal formations and the remains of ancient crinoids, making it a prized collector's item for those interested in rocks, fossils, and minerals. The fact that it is from the United States adds to its charm, as it represents a piece of American geology history.