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Johannite

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JYJ963911

Johannite

Description Tabs

Description
Locality: 
Geevor Mine, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 1.5 × 1.5 cm
Description

Green johannite associated with natrozippeite from the Geevor mine, Cornwall, UK. SEM-EDS confirmed. 

 

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