Did you know you can make a crystal eggshell geode using science? For this project you’ll need to start by making a supersaturated solution (steps 5-6). For our geodes, we used magnesium sulfate and aluminum potassium sulfate. What You Need: Raw eggs Water Food coloring 250 ml beakers Funnel (optional) Plastic cups Epsom salt (magnesium sulfate), alum (aluminum potassium … Continue reading How To Make Crystal Egg Geodes