Annabergite
A variety of Vivianite Group
What is Annabergite?
The crystalline properties of annabergite can range on the color spectrum from pearlescent pink to grassy-green, with brilliant green being most common and desirable. Cobalt concentration causes the variable colors. It is exceptionally rich in nickel and rare to find, with only one large deposit in Greece.
Etymology & Origins
It was long known (since 1758) under the name nickel bloom; the name annabergite was proposed by H. J. Brooke and W H. Miller in 1852, from Annaberg in Saxony, one of the localities of the mineral. It occurs with ores of nickel, of which it is a product of alteration.
Uses & Applications
Annabergite is used as a minor source of nickel. Nickel is used in coins, the process of hydrogenating oils, and batteries, as well as in metal alloys due to its corrosion resistance. Annabergite is also occasionally collected as a mineral specimen but its crystals are too small for use in jewelry.
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Annabergite Localities Map
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Key Characteristics
Rock Types of Annabergite
A variety, from Creetown in Kirkcudbrightshire, in which a portion of the nickel is replaced by calcium, has been called dudgeonite, after P. Dudgeon, who found it.
Characteristics of Annabergite
A fine apple-green color is its characteristic feature.
Health & Safety Information
- ⚠️Harm Reason: Annabergite dust is toxic because it contains heavy metals Arsenic, Nickel.
- ⚠️How to prevent the risks of Annabergite?
Quick Facts
Physical Properties
- Color
- Green, light grey to light apple green, white, pale rose red when rich in cobalt
- Hardness (Mohs)
- 1.5 - 2.5
- Density
- 3.146 g/cm³
- Streak
- Pale green to white, paler than the mineral color
- Luster
- Pearly, Dull, Sub-vitreous, Sub-adamantine
- Crystal System
- Monoclinic
Chemical Properties
- Chemical Formula
- Ni3(AsO4)2 · 8H2O
- Elements
- As, H, Ni, O
Also Known As
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