Pumice
Volcanic glass foam
Markings and exact colorations may vary.
A light grey stone full of bubbles that floats, rafted from distant volcanic eruptions.
- Typical size
- 0.5–4 in
- How often it turns up
- Uncommon
- Collecting
- Usually legal to collect
- Handling
- Safe to handle
Free to collect.
How to tell it apart
- Full of bubble holes
- Floats in water
- Very light, grey to tan
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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