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Johannite

About

Valid - described prior to 1959 (pre-IMA) - Grandfathered

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