Gilalite

General Information:
 Chemical Formula:
Cu5Si6O17·7(H2O)
 Composition:
(Molecular Weight = 884.34 gm)
Copper 35.93 % Cu
Silicon 19.06 % Si
Hydrogen 1.60 % H 
Oxygen 43.42 % O 
 Empirical Formula:
Cu5Si6O17·7(H2O)
 Environment:
Garnet-diopside tactite zone.
 IMA Status:
Approved IMA 1979
 Locality:
Christmas mine, Gila County, Arizona, USA.
 Name Origin:
Named for its locality.
Physical Properties:
 Color:
blue green or green.
 Density:
2.82
 Diaphaniety:
Translucent
 Habits:
Spherical - Spherical, rounded aggregates., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Fibrous - Crystals made up of fibers.
 Hardness:
2 - Gypsum
 Streak:
light green
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