🦴 Fossil facts
| Age | Ordovician onward, most common in Mississippian limestones about 359–323 million years old |
|---|---|
| Origin & sources | Worldwide. Classic sites are Indiana, Iowa (Le Grand), Missouri, Morocco and England (Yorkshire). |
| Composition | Calcite stem plates (ossicles), often in limestone |
How it forms
Crinoids ('sea lilies') are echinoderms with a flower-like crown on a stem of stacked calcite discs. When they died, the discs scattered and built up whole limestone beds.
🌍 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
Gray
RootCrown
GroundingIntuitionHealing
Healing crystal



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