Pebble look-alikes
Sedimentary rock fragment (likely quartz or chert)
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Open the appSeveral rocks and minerals can be confused with Pebble. 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
Cobble
Sedimentary clast (64-256 mm)
Also known as: Large clast
Gravel
Unconsolidated sedimentary clasts (2-64 mm)
Also known as: Loose aggregate
Conglomerate
Lithified sedimentary rock with rounded clasts >2mm
Also known as: Puddingstone (if matrix-supported)
Breccia
Lithified sedimentary rock with angular clasts >2mm
Also known as: Angular clast rock
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