 | Surprise Geodes For a fun and unique project for your children and their friends try the Break Your Own Surprise Geode. Safe for ages 4 and up, kids will be entertained for hours with this exciting activity and amazed at the surprise they find inside. The center of each geode is filled with a beautiful sparkling crystals specimin, each one unique in its own way. Whether an afterschool activity or in school lab project, breaking the unopened surprise geode is sure to be a hit with the kids. Everyone can feel like a geologist as the break open the gypsum plaster of their surprise geode and examine the treasure inside. Breaking their own surprise geodes is not only a fun experience for kids and classmates but it could also spark an abundance of possibilities within your children or students. For an all around great activity, let kids enjoy the thrill of breaking their very own Surprise Geodes! One geode per order All About Geodes: Geodes are geological rock formations which occur in sedimentary and certain volcanic rocks. Geodes are essentially rock cavities or vugs with internal crystal formations or concentric banding. The exterior of the most common geodes is generally limestone or a related rock, while the interior contains quartz crystals and/or chalcedony deposits. Some geodes are completely filled with crystal, being solid all the way through. Geodes are formed in hollow cavities within rocks that got there from some type of explosive gas, or empty spaces in the earth left from rotted roots of trees or animal dens, or trapped gasses. Groundwater circulation precipitated into these cavities depositing minerals in the spaces, and eventually over millions of years later these structures were formulated. During that time, different minerals acted on these geodes producing various colors. The most common mineral found in these geodes is quartz and come in colors of pink (rose), clear, (crystal), and purple (amethyst), according to the Utah Geological Survey. There are a wide array of colors these geodes come in naturally. Geodes are mainly found in the following states: Utah, Indiana, Ohio, Kentucky, Missouri, Southern California and Iowa, among other places. In addition, geodes are also found in Namibia, Mexico and Brazil. Iowa in particular is host to the renowned Keokuk geodes, containing up to 17 different minerals. Minerals give geodes their color. Formations are found in a 35-square-mile geode bank vault, so to speak. Located around Keokuk, Iowa, the geodes are famous worldwide. Some alternate spelling variations of this product: Geodes, break your own geodes, breaking your own geodes, geode science project, unopened geodes, unbroken geodes, surprise geode, break your own surprise geode | | |