Read the full experiment at http://www.stevespanglerscience.com/content/experiment/incredible-egg-geode Forgive the wordplay, but we love to do "eggs-periments." Get it? We've made naked eggs, put eggs in a bottle, folded eggs, and we've even shown you how to determine whether an egg is hard-boiled or raw. We want to find something new and amazing to do with eggs, and the Incredible Egg Geode is "eggs-actly" what we are looking for.
Thanks to Jim "Figgy" Noonan for the experiment idea. Check it out here http://www.marthastewart.com/343344/crystal-egg-geodes