IMA mineral species
Englishite
K₃Na₂Ca₁₀Al₁₅(PO₄)₂₁(OH)₇·26H₂O
Phosphate mineral.
Properties
⛏ Mohs hardness3
💅🪙🍶🔪💎
A copper coin scratches it.
| Chemical formula | K₃Na₂Ca₁₀Al₁₅(PO₄)₂₁(OH)₇·26H₂O |
|---|---|
| Elements | K, Na, Ca, Al, P, O, H |
| Crystal system | Monoclinic |
| Mohs hardness | 3 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Egs |
| Nickel–Strunz class | 8.DH.55 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 3: 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): Clay canyon, Fairfield, United States
- 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
- Englishite on Mindat.org
- Wikidata item Q3725373 (source of this page's data – you can correct it there)
IMA mineral species
3–4
Monoclinic
Soft, Scratches Easily