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Pyrite in fine-grained mafic or ultramafic rock look-alikes

Pyrite (FeS2) in a fine-grained mafic or ultramafic rock

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Several rocks and minerals can be confused with Pyrite in fine-grained mafic or ultramafic rock. 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

Chalcopyrite in host rock

Chalcopyrite (CuFeS2) in a fine-grained mafic or ultramafic rock

Also known as: Copper Pyrite in Basalt

Pyrrhotite in host rock

Pyrrhotite (Fe1-xS) in a fine-grained mafic or ultramafic rock

Also known as: Magnetic Pyrite in Diabase

Marcasite in host rock

Marcasite (FeS2) in a fine-grained mafic or ultramafic rock

Also known as: White Iron Pyrite in Shale

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