Agatized Coral
Fossil Anthozoa
Fossil coral replaced by silica, showing crystal-lined pockets and a stony flower pattern. Florida's state stone.
- Typical size
- 1–6 in
- How often it turns up
- Uncommon
- Collecting
- Check local rules
- Handling
- Safe to handle
Collecting from private land needs permission, and river or state-land collecting may need a permit. Beach finds are usually fine.
How to tell it apart
- Coral polyp pattern visible on the surface
- Hollow pockets lined with quartz crystals
- Very hard, takes a polish
Found one?
Photograph it and BeachNut will rank the likely matches, then log it to your collection.
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