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Geodes are round rocks containing a cavity that is lined with rock crystals. A casual observer may pass by these rocks with no idea of the treasure contained inside, but if you pay attention and know what to look for, you might be rewarded with a fascinating discovery.
Geodes are most often found in desert regions, but can be found almost anywhere including creek beds. I began my interest in geodes when I was in my teens, led on a hike through the woods in Indiana on a geode hunt. I doubted we would find anything, but to my delight, I did bring home several rocks that turned out to be geodes. The insides were nothing special, just a crust of quartz crystals, but it was a thrill to find something so out of the ordinary.
These fascinating structures can form in different ways. They can begin as bubbles in volcanic rock, animal burrows, mud balls, or tree roots in sedimentary rock. If a hollow cavity remains on the inside of the shape, the outer shell hardens and water seeps in depositing minerals which develop into crystals. The process resembles mineral deposits inside a cave, on a smaller scale.
Certain areas in Iowa are among the better known places to look for geodes. There are publicly accessible sites to look for geodes in the western United States, but they can be found almost anywhere. How do you identify a geode? They range in size from peas to over two feet across, and are spherical. Sometimes there are loose crystals inside that will rattle when shaken. And if you’re not interested in hunting for them yourself, many rock shops have geodes for sale. You can either purchase one that has been cut carefully to reveal its shining interior, or perhaps select from a pile of “unknown” geodes and have them broken or cut upon request. It’s always exciting to see what’s inside.
The inside of each geode can vary widely. White or clear quartz crystals are the most common, but also amethyst, agate, jasper, or chalcedony may be found – or perhaps a combination. Each geode has a unique display of crystal inside it. What can you do with them, once they’re open? They make interesting display items on their own, or can be used as bookends. Slices can be cut to be used as jewelry or suncatchers. I have seen many crafted objects that highlight the beauty of these treasures.
The next time you’re hiking through the woods and spy a perfectly round rock, you might be looking at a geode. These miniature caves can offer us a small slice of beauty and provide endless fascination. It’s always exciting to see what’s inside, and rarely a disappointment. Refrain from smashing them open carelessly, because if there is a treasure inside you’ll want to display it at its best.
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