Geode look-alikes
Geode (likely Quartz or Chalcedony interior)
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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.
Similar rocks to compare
Nodule
Various (e.g., Chert Nodule, Phosphate Nodule)
Also known as: Concretion
Vug
Vug (a general term for a small cavity in a rock, often lined with crystals, but not necessarily spherical or completely enclosed like a geode)
Also known as: Druse
Agate
Agate (a variety of chalcedony, often found filling cavities, but typically solid or with very small central vugs, not hollow like a geode)
Also known as: Banded Chalcedony
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