IMA mineral species
Picromerite
K₂Mg(SO₄)₂·6H₂O
Sulfate mineral.
Properties
⛏ Mohs hardness2.5
💅🪙🍶🔪💎
Scratches with a fingernail.
🔷 Monoclinic✏️ streak white
| Chemical formula | K₂Mg(SO₄)₂·6H₂O |
|---|---|
| Elements | K, Mg, S, O, H |
| Crystal system | Monoclinic |
| Mohs hardness | 2.5 |
| Density | — |
| Streak | white |
| Color | — |
| IMA symbol | Pmr |
| Nickel–Strunz class | 7.CC.60 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 2.5: 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): Mount Vesuvius, Italy
- Type locality
- Notable source / deposit
- Country of origin
Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.
Learn more
- Picromerite on Mindat.org
- Wikipedia article
- Wikidata item Q3902692 (source of this page's data – you can correct it there)
IMA mineral species
2–3
Monoclinic
RedYellowGrayWhite & Clear
Soft, Scratches Easily