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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Zinnwaldite from
White Picacho Mining District, Maricopa County, Arizona, USA


Locality type:Mining District
Classification
Species:'Zinnwaldite' (not an IMA approved species)
Comments:Rare in pegmatites.
Colour:Very dark; golden-brown (cleavage flakes).
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Amblygonite
Spodumene
Data
Mineral Data:Click here to view Zinnwaldite data
Locality Data:Click here to view White Picacho Mining District, Maricopa County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:195232
Long-form Identifier:1:3:195232:2
GUID (UUID V4):0
References
Jahns, R.H. (1952), Pegmatite deposits of the White Picacho District, Maricopa and Yavapai Cos., AZ, AZ Bur. Mines Bull. 162: 79.
Anthony, John W.; Williams, Sidney A.; Bideaux, Richard A.; Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.p.430
 
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