🦴 Fossil facts
| Age | Various. Popular agatized coral from Florida is about 20–30 million years old (Oligocene–Miocene). |
|---|---|
| Origin & sources | Florida (Tampa Bay agatized coral, Florida's state stone), Indonesia, Morocco, Michigan (Petoskey and Charlevoix stones). |
| Composition | Calcite or aragonite, often replaced by chalcedony (agatized) |
How it forms
Coral skeletons were buried, then silica-rich water slowly replaced the calcium carbonate with chalcedony, preserving the polyp structure in agate.
🌍 Where it's found
- Type locality
- Notable source / deposit
- Country of origin
Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.
Learn more
Fossil
Orange
RootSacral
Healing crystal




