Chalk look-alikes

Limestone (biogenic sedimentary rock composed primarily of calcite)

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Several rocks and minerals can be confused with Chalk. 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

Limestone

Also known as: Calcium Carbonate Rock

Marl

Also known as: Calcareous Clay

Dolomite

Also known as: Dolomitic Limestone

Travertine

Also known as: Calcareous Tufa

Explore Chalk

Overview

Full guide to Chalk

Identification

Localities & Collecting

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