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Annabergite Calcite Gaspéite Ankerite & Psilomelane

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AST204699

Description Tabs

Description
Locality: 
Km-3 Mine, Lavrion District, Attiki Prefecture, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.8 × 4 × 4 cm
Description

Groups of intense dark green annabergite crystals in cavity with brown rhomboedral ankerite,secondary scalenoedral calcite and black psilomelane crusts. Very interesting is yellowish calcite (due to gaspeite inclusions) attached to the far left point of specimen.

Mineral Data
What's on the rock

Annabergite

Formula: 
Ni3(AsO4)2·8H2O
Strunz: 
8.CE.40
Crystal System: 
Monoclinic
Hardness: 
1.5 - 2.5
Type Locality: 
Teichgräber Flacher vein, Teichgräber deep adit, Kippenhain Mine (Kippenhayn Mine), Schreckenberg, Frohnau, Annaberg-Buchholz, Annaberg District, Erzgebirge, Saxony, Germany

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Gaspéite

Formula: 
(Ni,Mg,Fe)CO3
Strunz: 
5.AB.05
Hardness: 
4.5 - 5.0
Type Locality: 
New Jersey Zinc Exploration Co. trench, Mont-Albert, La Haute-Gaspésie RCM, Gaspésie-Îles-de-la-Madeleine, Québec, Canada

Ankerite

Formula: 
Ca(Fe2+,Mg)(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Styrian Erzberg, Eisenerz, Styria, Austria