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Johannite

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CR40514

Johannite

Type locality
Rare Mineral

Description Tabs

Description
Locality: 
Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 2.8 × 2.5 cm
Description

Very rich Johannite specimen from the type locality.

Yellowgreen globular Johannite on matrix. Analysed specimen.

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