IMA mineral species
Kaolinite
Al₂Si₂O₅(OH)₄
Layered aluminosilicate 1:1 clay mineral.
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Properties
⛏ Mohs hardness1
💅🪙🍶🔪💎
Scratches with a fingernail.
🔷 Triclinic✏️ streak white
| Chemical formula | Al₂Si₂O₅(OH)₄ |
|---|---|
| Elements | Al, Si, O, H |
| Crystal system | Triclinic |
| Mohs hardness | 1 |
| Density | — |
| Streak | white |
| Color | — |
| IMA symbol | Kln |
| Nickel–Strunz class | 9.ED.05 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 1: softer than a steel knife, so it scratches easily. Store it apart from harder stones.
Learn more
- Kaolinite on Mindat.org
- Wikipedia article
- Wikidata item Q223197 (source of this page's data – you can correct it there)
IMA mineral species
1–2
Triclinic
RedYellowBlueBrownWhite & Clear
Soft, Scratches Easily