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Chrysocolla

Mineral Data
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5
Tenacity: 
brittle
Synonyms
Synonyms: 
Crysocolla, Demidovite, Crisocolla and Chrysokolla