Concretion look-alikes

Sedimentary Concretion

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Several rocks and minerals can be confused with Concretion. 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

Geode

Also known as: Crystal-lined cavity

Nodule

Nodule (a specific type of concretion, often siliceous)

Also known as: Chert Nodule, Flint Nodule

Septarian Nodule

Septarian Concretion

Also known as: Septarian Concretion, Dragon Stone

Explore Concretion

Overview

Full guide to Concretion

Identification

Localities & Collecting

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