Geode look-alikes
Geode (Quartz variety)
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Open the appSeveral rocks and minerals can be confused with Geode. Below are documented look-alikes and the features that tell them apart. Never rely on a single feature. Always check multiple properties.
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Thunder Egg
Spherulitic Rhyolite Nodule
Also known as: Lithophysae
Concretion
Various mineral compositions (e.g., ironstone, carbonate concretion)
Also known as: Nodule
Vug
Geological cavity lined with crystals
Also known as: Cavity, druse
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