School of Hard Rocks

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A Dugway Geode

Geodes can be even more mysterious than agates. Most times you see geodes that have been sliced and polished to reveal amazing cross sections around an interior of crystal points. Not all geodes are so blessed but all of them that I have encountered tumble to reveal a structures that are complex and always interesting. This geode, from Dugway, Utah, has a cavity with very fine crystals on the inner face (left photo). The back side (right photo) shows great character in the layered lobe and then the inclusion of the lighter, chrystaline material on the lower left.

Did you know that a geode with a solid center is called a thunder egg?