IMA mineral species
Rossmanite
☐(LiAl₂)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Tourmaline, cyclosilicate mineral.
Properties
⛏ Mohs hardness7
💅🪙🍶🔪💎
Harder than quartz: scratches glass and steel.
| Chemical formula | ☐(LiAl₂)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH) |
|---|---|
| Elements | Li, Al, Si, O, B, H |
| Crystal system | Trigonal |
| Mohs hardness | 7 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Rsm |
| Nickel–Strunz class | 9.CK.05 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Learn more
- Rossmanite on Mindat.org
- Wikidata item Q3941647 (source of this page's data – you can correct it there)
IMA mineral species
7–8
Trigonal