Annabergite
Mineral Ni3(AsO4)2·8H2O
Also called Nickel bloom
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Apple-green crusts and rare fine crystals where nickel arsenides weather, the nickel partner of erythrite. The best crystals come from Lavrion in Greece; named for Annaberg in Saxony.
- Type
- Mineral
- Group
- Arsenate, vivianite group
- Formula
- Ni3(AsO4)2·8H2O
- Hardness (Mohs)
- 1.5–2.5
- Specific gravity
- 3–3.1
- Streak
- pale green to white
- Lustre
- vitreous (glassy), pearly, earthy
- Crystal system
- Monoclinic
- Colours
- apple green, pale green, white, grey
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.