Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Gibbsite from
Sacramento Pit, Sacramento Hill, Bisbee, Cochise County, Arizona, USA


Locality type:Pit
Classification
Species:Gibbsite
Formula:Al(OH)3
Comments:Massive, botryoidal material as an alteration product of chalcoalumite.
Colour:Pale blue
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Chalcoalumite
Goethite
Quartz
Data
Mineral Data:Click here to view Gibbsite data
Locality Data:Click here to view Sacramento Pit, Sacramento Hill, Bisbee, Cochise County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:249497
Long-form Identifier:1:3:249497:5
GUID (UUID V4):0
Nearest other occurrences of Gibbsite
0.2km (0.1 miles) ⓘHolbrook Mine, Copper Queen Mine, Queen Hill, Bisbee, Cochise County, Arizona, USA
0.9km (0.6 miles) ⓘLavender Pit, Bisbee, Cochise County, Arizona, USA
References
Williams, Sidney A., Khin, BaSaw (1971) Chalcoalumite from Bisbee, Arizona. The Mineralogical Record, 2 (3) 126-127
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.pages 162, 231
 
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