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Annabergite Mimetite Calcite Ankerite Gaspéite Nickeloan Adamite & Psilomelane

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AST204709

Annabergite Mimetite Calcite Ankerite Gaspéite Nickeloan Adamite & Psilomelane

Description Tabs

Description
Locality: 
Km-3 Mine, Lavrion District, Attiki Prefecture, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.6 × 2.5 × 3 cm
Description

Matrix surface with intense green annabergite crystals, sharp scalenoedral yellowish calcite with gaspeite inclusions, brown rhomboedral ankerite and black psilomelan aggrecates and crusts. Most important is that cavity is sprayed with nickeloan adamite microcrystals and there is a beautiful acicular radiating white (Ca rich) mimetite attached on a psilomelane sphere covered by adamite. An extremely rare mineral combination from Km-3 mine!.

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

Mimetite

Formula: 
Pb5(AsO4)3Cl
Strunz: 
8.BN.05
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Treue Freundschaft Mine, Johanngeorgenstadt, Johanngeorgenstadt District, Erzgebirge, Saxony, Germany

Calcite

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

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

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

Nickeloan Adamite

Variety Of: 

Adamite

Formula: 
Zn2(AsO4)(OH)
Strunz: 
8.BB.30
Hardness: 
3.5
Formula: 
(Zn,Ni)2AsO4(OH)
Hardness: 
0.0