Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Hydrohalloysite from
Castle Dome Mine (Castle Dome deposit; Pinto Valley deposit), Castle Dome area (Castle Dome Mine area; Pinto Valley Mine area), Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA


Locality type:Mine
Classification
Species:'Hydrohalloysite' (not an IMA approved species)
Formula:Al2Si2O5(OH)4 · 2H2O
Comments:Small quantities in the capping & in the chalcocite zone in quartz monzonite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Hydrohalloysite data
Locality Data:Click here to view Castle Dome Mine (Castle Dome deposit; Pinto Valley deposit), Castle Dome area (Castle Dome Mine area; Pinto Valley Mine area), Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:149623
Long-form Identifier:1:3:149623:9
GUID (UUID V4):0
Nearest other occurrences of Hydrohalloysite
28.9km (17.9 miles) ⓘRay Mine, Scott Mountain, Pinal County, Arizona, USA
References
Peterson, N.P., et al (1946), Hydrothermal alteration in the castle Dome copper deposit, AZ, Econ.Geol.: 41: 820-840
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 108.
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.p.213
 
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