Arsenopyrite
| Colour | Gray, White |
|---|---|
| Mohs hardness | 5.5–6 |
| Lustre | Metallic |
| Streak | Black |
| Crystal system | Monoclinic |
| Transparency | Opaque |
| Cleavage | 110 (distinct) |
| Fracture | Subconchoidal to rough |
| Chemical formula | FeAsS |
| Specific gravity | 5.9–6.2 |
What is Arsenopyrite?
Arsenopyrite is an iron arsenic sulfide (FeAsS). It is a hard metallic, opaque, steel grey to silver white mineral with a relatively high relative density of 6.1.
How to identify Arsenopyrite
- Lustre: Metallic.
- Hardness: Mohs 5.5–6 — about as hard as a steel knife.
- Streak: Black.
- Habit: Monoclinic crystal system.
Arsenopyrite in different forms
Stones often confused with Arsenopyrite
Frequently asked questions
How hard is Arsenopyrite?
Arsenopyrite is Mohs 5.5–6 on the hardness scale.
What colour is Arsenopyrite?
Arsenopyrite is typically gray, white (Steel grey to silver white).