Discover the reaction of salt and observe the formation of crystals . You can create your own crystals. Do experiments with many chemicals. Create the sparkling stone called “Geode”.Unearth real rocks and start your collection.The box contains a block of earth, stones and minerals, a hammer, a chisel, 8 sachets of aluminum and potassium sulphate, a bag of plaster, a tweezers, a spatula, latex gloves, a glass of 100 ml with lid, a 50 ml glass with lid, a bowl, a geode mold and an illustrated manual.