Coral Rubble
Dead scleractinian skeleton
Markings and exact colorations may vary.
Small, chalky white sticks and lumps of dead coral, the raw material of Keys beaches.
- Typical size
- 0.5–4 in
- How often it turns up
- Very common in the Keys
- Collecting
- Protected, do not collect
- Handling
- Safe to handle
Living and freshly dead coral is protected in Florida. Beach-worn rubble is usually fine, but many parks prohibit removing any coral.
How to tell it apart
- Chalky white, porous, light
- Fine pore texture visible up close
- Often rod or finger shaped
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
Found one?
Photograph it and BeachNut ranks the likely matches with a confidence read, then logs it to your collection with the beach and date.
Browsing beaches and the full field guide is free. A free account logs unlimited finds and gives you three photo identifications a day.
More rocks in the field guide
Get Florida beachcombing tips
Occasional emails: what's washing up, shelling tips and new BeachNut features. No spam, unsubscribe any time.





