IMA mineral species
Magnesio-riebeckite
☐Na₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂
Na-amphibole, double chain inosilicate mineral.
Properties
⛏ Mohs hardness5 – 7
💅🪙🍶🔪💎
Harder than quartz: scratches glass and steel.
| Chemical formula | ☐Na₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂ |
|---|---|
| Elements | Na, Mg, Fe, Si, O, H |
| Crystal system | Monoclinic |
| Mohs hardness | 5 – 7 |
| Density | — |
| Streak | — |
| Color | — |
| Cleavage | {110} |
| IMA symbol | Mrbk |
| Nickel–Strunz class | 9.DE.25 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Varieties & related stones
Learn more
- Magnesio-riebeckite on Mindat.org
- Wikidata item Q3843298 (source of this page's data – you can correct it there)
IMA mineral species
5–6
Monoclinic