IMA mineral species
Johannsenite
CaMn²⁺Si₂O₆
Pyroxene mineral.
Properties
⛏ Mohs hardness6
💅🪙🍶🔪💎
Scratches glass; quartz scratches it.
| Chemical formula | CaMn²⁺Si₂O₆ |
|---|---|
| Elements | Ca, Mn, Si, O |
| Crystal system | Monoclinic |
| Mohs hardness | 6 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Jhn |
| Nickel–Strunz class | 9.DA.15 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Franklin, United States · Campiglia Marittima, Italy · Recoaro Terme, 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
- Johannsenite on Mindat.org
- Wikipedia article
- Wikidata item Q2253090 (source of this page's data – you can correct it there)
IMA mineral species
6–7
Monoclinic