IMA mineral species
Mejillonesite
HNaMg₂(HPO₄)(PO₄)(OH)·2H₂O
Phosphate mineral.
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Properties
⛏ Mohs hardness4
💅🪙🍶🔪💎
A steel knife scratches it, it won't scratch glass.
| Chemical formula | HNaMg₂(HPO₄)(PO₄)(OH)·2H₂O |
|---|---|
| Elements | H, Na, Mg, P, O |
| Crystal system | Orthorhombic |
| Mohs hardness | 4 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Mej |
| Nickel–Strunz class | 8.D0. |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 4: softer than a steel knife, so it scratches easily. Store it apart from harder stones.
🌍 Where it's found
Type locality (where it was first described): Cerro Mejillones, Chile · Cerro Mejillones, Chile
- 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
- Mejillonesite on Mindat.org
- Wikidata item Q10859434 (source of this page's data – you can correct it there)
IMA mineral species
4–5
Orthorhombic
Soft, Scratches Easily