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Turquoise

Mineral Data
Cu(Al,Fe3+)6(PO4)4(OH)8·4H2O
Strunz: 
8.DD.15
Physical Properties
Crystal System: 
Triclinic
Hardness: 
5.0 - 6.0
Tenacity: 
brittle
Synonyms
Synonyms: 
Turquois and Turchese