Goethite Concretion look-alikes
FeO(OH)
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Open the appSeveral rocks and minerals can be confused with Goethite 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
Hematite Concretion
Hematite (Fe2O3)
Also known as: Kidney Ore (for botryoidal forms)
Limonite
Mixture of iron oxyhydroxides, primarily goethite and lepidocrocite
Also known as: Bog Iron, Brown Iron Ore
Siderite Concretion
Siderite (FeCO3)
Also known as: Iron Carbonate Concretion
Pyrite Concretion
Pyrite (FeS2)
Also known as: Iron Pyrite Nodule
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