Scorodite
Mineral FeAsO4·2H2O
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Pale blue-green to greyish-blue dipyramids and crusts formed where arsenopyrite weathers. Fine crystals come from Tsumeb in Namibia, the Ojuela mine in Mexico, and Cornwall.
- Type
- Mineral
- Group
- Arsenate, variscite group
- Formula
- FeAsO4·2H2O
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 3.1–3.3
- Streak
- greenish white
- Lustre
- vitreous (glassy), adamantine (diamond-like), resinous
- Crystal system
- Orthorhombic
- Colours
- pale green, blue-green, blue, grey-green, brown, violet
- Transparency
- transparent, translucent
- Cleavage and fracture
- imperfect; subconchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.