Mineral description : Annabergite

Annabergite coating on nickel ore from Telkkälä, Finland.

Annabergite covering a vein of gersdorffite, from Lainejaur, Sweden.

Mineral class	Phosphates : Torbernite - Carnotite - Annabergite group.
Chemical formula	Ni3(AsO4)2.8H2O
Crystal system	Monoclinic.
Habitus	Flattened striated blades or radiating accicular crystals. Often as thin earthy encrustations.
Cleavage	[010] perfect, fracture brittle, flaky.
Hardness	2
Density	3.1
Color	Green to pale green.
Streak	Light green.
Luster	Vitreous, adamantine to dull, transparent to translucent.
Description
Occurance	As an oxidation product associated with nickel ores.
Associates	Nickel ores, Nickeline.
Notes	Type locality : Annaberg, Sachsen, Germany. Also called "Nickel bloom". Thin flakes are flexible.
Locations	Not so common in Sweden. Lainejaur, Lappland, Sweden. As thin surfaces on nickeline and gersdorffite. Gladhammargruvan, Småland, Sweden.

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