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Annabergite Calcite & Psilomelane

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AST204711

Annabergite Calcite & Psilomelane

Description Tabs

Description
Locality: 
Km-3 Mine, Lavrion District, Attiki Prefecture, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5.3 × 2.8 cm
Description

Cavity filled with bright dark green annabergite crystal groups with minor scalenoedral calcite and black psilomelan crusts. Whitish carbonate mineral (calcite?) is also present

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
Not Sold