Properties
⛏ Mohs hardness3
💅🪙🍶🔪💎
A copper coin scratches it.
🔷 Monoclinic✏️ streak black
| Chemical formula | Fe²⁺₂Fe³⁺O₂(BO₃) |
|---|---|
| Elements | Fe, O, B |
| Crystal system | Monoclinic |
| Mohs hardness | 3 |
| Density | — |
| Streak | black |
| Color | — |
| IMA symbol | Hls |
| Nickel–Strunz class | 6.AB.45 |
“—” 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.
Learn more
- Hulsite on Mindat.org
- Wikidata item Q3787559 (source of this page's data – you can correct it there)
IMA mineral species
3–4
Monoclinic
Soft, Scratches Easily