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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Dumortierite from
Dome Rock Mountains, La Paz County, Arizona, USA


Locality type:Mountain Range
Classification
Species:Dumortierite
Formula:Al(Al2O)(Al2O)2(SiO4)3(BO3)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Dumortierite data
Locality Data:Click here to view Dome Rock Mountains, La Paz County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:224441
Long-form Identifier:1:3:224441:9
GUID (UUID V4):0
Nearest other occurrences of Dumortierite
10.6km (6.6 miles) ⓘQuartzsite deposit, Quartzsite, La Paz County, Arizona, USA
62.8km (39.0 miles) ⓘClip Wash, Clip, Hidden Valley, Silver Mining District, La Paz County, Arizona, USA
63.5km (39.5 miles) ⓘClip, Hidden Valley, Silver Mining District, La Paz County, Arizona, USA
65.0km (40.4 miles) ⓘClip Mine, Clip, Hidden Valley, Silver Mining District, La Paz County, Arizona, USA
82.7km (51.4 miles) ⓘUnnamed Dumortierite occurrence [2], Picacho Peak, Picacho Mining District, Chocolate Mountains, Imperial County, California, USA
84.7km (52.6 miles) ⓘUnnamed Dumortierite occurrences [1], Ogilby, Imperial County, California, USA
85.4km (53.1 miles) ⓘIndian Pass placer, Indian Pass, Chocolate Mountains Mining District, Chocolate Mountains, Imperial County, California, USA
References
Reynolds, S.J. et al (1988), Geologic setting of Mesozoic and Cenozoic metamorphism in AZ, in W.G. Ernst (editor), Metamorphism and crustal evolution of the western United States. Ruby Vol. No. 7, Prentice Hall, NY: 466-501.
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.p.270
 
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