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Gypsum look-alikes

CaSO4·2H2O

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Several rocks and minerals can be confused with Gypsum. 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

Anhydrite

CaSO4

Also known as: Anhydrous Calcium Sulfate

Calcite

CaCO3

Also known as: Calcium Carbonate

Halite

NaCl

Also known as: Rock Salt

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