IMA mineral species
Colemanite
CaB₃O₄(OH)₃·H₂O
Borate mineral.
Properties
⛏ Mohs hardness4.5
💅🪙🍶🔪💎
A steel knife scratches it, it won't scratch glass.
🔷 Monoclinic✏️ streak white
| Chemical formula | CaB₃O₄(OH)₃·H₂O |
|---|---|
| Elements | Ca, B, O, H |
| Crystal system | Monoclinic |
| Mohs hardness | 4.5 |
| Density | — |
| Streak | white |
| Color | — |
| IMA symbol | Cole |
| Nickel–Strunz class | 6.CB.10 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 4.5: 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): Furnace Creek district, United States
Learn more
- Colemanite on Mindat.org
- Wikipedia article
- Wikidata item Q2293541 (source of this page's data – you can correct it there)
IMA mineral species
4–5
Monoclinic
YellowGrayWhite & Clear
Soft, Scratches Easily