IMA mineral species
Krupkaite
PbCuBi₃S₆
Sulfosalt mineral; aikinite substitution percentage: 50; 49 to 50 (?).
Properties
⛏ Mohs hardness4
💅🪙🍶🔪💎
A steel knife scratches it, it won't scratch glass.
| Chemical formula | PbCuBi₃S₆ |
|---|---|
| Elements | Pb, Cu, Bi, S |
| Crystal system | Orthorhombic |
| Mohs hardness | 4 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Krp |
| Nickel–Strunz class | 2.HB.05a |
“—” 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.
Learn more
- Krupkaite on Mindat.org
- Wikidata item Q3817166 (source of this page's data – you can correct it there)
IMA mineral species
4–5
Orthorhombic
Soft, Scratches Easily