Limestone Cobble
Marine limestone
Markings and exact colorations may vary.
A pale, pitted cobble of Florida's bedrock, often drilled by boring clams and worms.
- Typical size
- 1–8 in
- How often it turns up
- Common
- Collecting
- Check local rules
- Handling
- Safe to handle
Loose cobbles are usually fine; do not break shoreline outcrop.
How to tell it apart
- Pale cream to grey, pitted and pocked
- Fizzes faintly in vinegar
- Round drill holes from boring bivalves
Where to find these in Florida
Beaches rated very good or excellent for rocks. Each page shows today’s score, the best window and access details.
- Big Talbot Island Boneyard Beach · Jacksonville
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More rocks in the field guide
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