Chert look-alikes

Chert (cryptocrystalline quartz)

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Several rocks and minerals can be confused with Chert. 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

Jasper

Jasper (cryptocrystalline quartz)

Also known as: Red Chert, Green Chert

Agate

Agate (banded cryptocrystalline quartz)

Also known as: Banded Chalcedony

Chalcedony

Chalcedony (cryptocrystalline quartz)

Also known as: Cryptocrystalline Quartz

Flint

Flint (cryptocrystalline quartz)

Also known as: Black Chert

Opal

Opal (SiO2·nH2O)

Also known as: Hydrated Amorphous Silica

Explore Chert

Overview

Full guide to Chert

Identification

Localities & Collecting

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