Actinolite
☠️ Don't Wear / Don't Make Elixirs
Ca₂(Mg,Fe)₅[OH|Si₄O₁₁]₂
Ca-amphibole, double chain inosilicate mineral.
Properties
| Chemical formula | Ca₂(Mg,Fe)₅[OH|Si₄O₁₁]₂ |
|---|---|
| Elements | Ca, Mg, Fe, O, H, Si |
| Crystal system | Monoclinic |
| Mohs hardness | — |
| Density | — |
| Streak | white |
| Color | — |
| Cleavage | {110} |
| IMA symbol | Act |
| Nickel–Strunz class | 9.DE.10 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- ☠️ Don't Wear / Don't Make Elixirs Fibrous actinolite is a regulated asbestos mineral. Gem nephrite jade is a dense, felted actinolite-tremolite that is safe when polished, but it shouldn't be dry-cut.
This stone is in the Handle With Care collection; see the safety section below.
⚠ Handle With Care Moderate caution
Why: Fibrous actinolite is a regulated asbestos mineral. Gem nephrite jade is a dense, felted actinolite-tremolite that is safe when polished, but it shouldn't be dry-cut.
Safe handling: Handle it as a solid specimen only. Never cut, sand, polish or grind it. If you must clean it, do so wet, wear a P100 / FFP3 mask and gloves, and keep it away from children and pets.
Sources: Wikipedia: Actinolite · ATSDR ToxFAQs: Asbestos · USGS: Asbestos & other natural mineral fibres. General safety information only, not medical advice. More on safe handling.
Learn more
- Actinolite on Mindat.org
- Wikipedia article
- Wikidata item Q104692 (source of this page's data – you can correct it there)