📜 Key facts
| Age | Varies by deposit |
|---|---|
| Origin & sources | Morocco, Mexico, England and the USA. It is often sold as 'selenite' wands and towers. |
| Composition | Fibrous gypsum (CaSO₄·2H₂O). Most 'satin spar' sold today is gypsum, not calcite, although the name was once also used for fibrous calcite and aragonite |
How it forms
Gypsum grew in parallel fibres in veins, giving a silky sheen. It is soft (Mohs 2) and slightly water-soluble, so keep it dry.
Mineral data: see Gypsum.
🌍 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.
🔗 See also
✨ Calcite family
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Black CalciteMineral variety
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Blue CalciteMineral variety
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CalciteIMA mineral species

Calcite GeodeGeode / nodule
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Caribbean Blue CalciteMineral variety

CobaltocalciteMineral variety

Dogtooth CalciteMineral variety
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Green CalciteMineral variety

Honey CalciteMineral variety

Iceland sparMineral variety
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Lemon CalciteMineral variety

Manganoan calciteMineral variety
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Mango CalciteMineral variety
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Merkabite CalciteMineral variety
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Nailhead sparMineral variety
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Orange CalciteMineral variety
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Rainbow CalciteMineral variety
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Red CalciteMineral variety
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Stellar Beam CalciteMineral variety
Learn more
Mineral variety
White & Clear
CrownThird Eye
Healing crystal




