National Geographic Break Open 10 Premium Geodes
If you are less inclined to grow crystals and more prone to break them open, then this is the kit for you. Geodes start as bubbles in a rock or as something (an animal, a tree root, or even mud!) creates a vacant space in sedimentary rock. Over millions of years, the outer shell of the rock hardens, but the inside of the rock traps water containing silica inside, which then eats away at the inner walls and voila – crystal forms.
This specific kit comes with ten geodes ranging in size from ping-pong balls to tennis balls, safety goggles, three display stands to show off your favorite geodes, and a sixteen-page, full-color learning guide to teaching you all the facts you need to know about geodes.
Buy your very own piece of natural history for $25 right here!