Properties
⛏ Mohs hardness4.5
💅🪙🍶🔪💎
A steel knife scratches it, it won't scratch glass.
⚖ Density4.607 g/cm³
Very heavy
🔷 Tetragonal✏️ streak black
| Chemical formula | Cu₂ZnSnS₄ |
|---|---|
| Elements | Cu, Zn, Sn, S |
| Crystal system | Tetragonal |
| Mohs hardness | 4.5 |
| Density | 4.607 g/cm³ |
| Streak | black |
| Color | — |
| IMA symbol | Kës |
| Nickel–Strunz class | 3.CB.15a |
“—” 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): Kester tin deposit, Russia
Learn more
- Kësterite on Mindat.org
- Wikipedia article
- Wikidata item Q411526 (source of this page's data – you can correct it there)
IMA mineral species
4–5
Tetragonal
GreenBlack
Soft, Scratches Easily