Properties
| Chemical formula | K(☐,Na)₂(Mn,Fe,Mg)₂[(Be,Al)₃Si₁₂]O₃₀ |
|---|---|
| Elements | K, Na, Mn, Fe, Mg, Be, Al, Si, O |
| Crystal system | Hexagonal |
| Mohs hardness | 6 |
| Density | 2.72 g/cm³ |
| Streak | — |
| Color | — |
| IMA symbol | Alr |
| Nickel–Strunz class | 9.CM.05 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Caspar quarry, Germany
- 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
- Almarudite on Mindat.org
- Wikipedia article
- Wikidata item Q3612730 (source of this page's data – you can correct it there)
IMA mineral species
6–7
Hexagonal
OrangeYellow