Boulder look-alikes
Boulder
Got a photo? Identify rocks instantly with the Rockby app
Open the appSeveral rocks and minerals can be confused with Boulder. 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
Not a specific rock, but a size classification (64-256 mm)
Also known as: Large pebble
Gravel
Not a specific rock, but a size classification (2-64 mm)
Also known as: Pebble, granule
Outcrop
Not a specific rock, but a geological feature
Also known as: Bedrock exposure
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