Properties
| Chemical formula | AsS |
|---|---|
| Elements | As, S |
| Crystal system | Monoclinic |
| Mohs hardness | — |
| Density | 3.26 g/cm³ |
| Streak | — |
| Color | — |
| IMA symbol | Rlg |
| Nickel–Strunz class | 2.FA.15a |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
⚠ Handle With Care High caution
Why: Arsenic sulfide (As₄S₄). It is toxic if swallowed or if its dust is inhaled. Light breaks it down into a yellow powder (pararealgar), which makes handling dust likely.
Safe handling: Wash your hands after handling. Don't lick it, put it in your mouth, or make elixirs with it. Don't cut or grind it. Display it out of reach of children and pets. Store it in the dark in a closed box.
Sources: Wikipedia: Realgar · ATSDR ToxFAQs: Arsenic · Mindat: Realgar. General safety information only, not medical advice. More on safe handling.
Learn more
- Realgar on Mindat.org
- Wikipedia article
- Wikidata item Q109746 (source of this page's data – you can correct it there)
IMA mineral species
Monoclinic
RedOrangeYellowGray
Handle with careToxic if ingestedDust / fibre inhalation hazardDon't make water elixirs