Chalk look-alikes

Limestone (biogenic sedimentary rock composed primarily of coccolithophores)

Got a photo? Identify rocks instantly with the Rockby app

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 Claystone

Dolomite

Also known as: Dolostone

Explore Chalk

Overview

Full guide to Chalk

Identification

Localities & Collecting

Identify rocks anywhere

Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.

Download on theApp Store Get it onGoogle Play Continue onWeb

Open in app