Anthonyite

General Information:
 Chemical Formula:
Cu(OH,Cl)2·3(H2O)
 Composition:
(Molecular Weight = 160.83 gm)
Copper 39.51 % Cu
Hydrogen 4.70 % H 
Chlorine 11.02 % Cl
Oxygen 44.77 % O 
 Empirical Formula:
Cu(OH)1.5Cl0.5·3(H2O)
 Environment:
Secondary copper mineral.
 IMA Status:
Approved IMA 1963
 Locality:
Centennial mine, Calumet, Houghton County, Michigan, USA.
 Name Origin:
Nmaed for John W. Anthony (1920-1992), mineralogist, University of Arizona.
Physical Properties:
 Cleavage:
[100] Perfect
 Color:
blue or gray violet.
 Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
 Hardness:
2 - Gypsum
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