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Annabergite Calcite & Cabrerite

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AST204696

Annabergite Calcite & Cabrerite

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Description
Locality: 
Km-3 Mine, Lavrion, Attica, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 5 × 3.2 cm
Description

Groups of intense green radiating annabergite crystals in matrix cavity with minor scalenoedral calcite and black psilomelane crusts

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

Cabrerite

Synonym Of: 

Magnesian Annabergite

Formula: 
(Ni,Mg)3(AsO4)2·8H2O
Hardness: 
0.0

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