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Johannite

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CAM188526

Johannite

Description Tabs

Description
Locality: 
Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.5 × 0.6 cm
Description

A rich coverage of light apple-green crystals and spherical clusters of johannite on matrix from the Giftkiesstollen in Jachymov. The copper-uranyl-sulfate johannite was named after Archduke Johann of Austria (1782-1859).
Beautiful under magnification.

Mineral Data
What's on the rock

Johannite

Formula: 
Cu(UO2)2(SO4)2(OH)2·8H2O
Strunz: 
7.EB.05
Crystal System: 
Triclinic
Hardness: 
2.0 - 2.5
Colour: 
Emerald-green
Type Locality: 
Elias Mine, Jáchymov, Krušné Hory, Karlovy Vary, Bohemia, Czech Republic
Cartils Minerals

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