🪨 Geode facts
| Age | Madagascar celestite geodes are Cretaceous, about 100 million years old |
|---|---|
| Origin & sources | Mahajanga region, Madagascar (the main source); also Ohio (Put-in-Bay 'Crystal Cave'), Mexico and Morocco. |
| Composition | Strontium sulfate (celestine) crystals in a limestone or clay nodule |
How it forms
Strontium-rich fluids moved through marine sediments and grew pale-blue celestine crystals inside cavities and nodules.
Mineral data: see Celestine.
🌍 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
Geode / nodule
Blue
ThroatCrown
Healing crystal



