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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Melanterite from
Alma Mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills (San Leandro Hills), Alameda County, California, USA


Locality type:Mine
Classification
Species:Melanterite
Formula:Fe2+(H2O)6(SO4) · H2O
Comments:Occurs on mine walls (post-mining product).
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Boothite
Chalcanthite
Associated Minerals Based on Photo Data:
Chalcanthite1
Pyrite1
Data
Mineral Data:Click here to view Melanterite data
Locality Data:Click here to view Alma Mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills (San Leandro Hills), Alameda County, California, USA
Data Identifiers
Mindat Occurrence Record ID:7533
Long-form Identifier:1:3:7533:6
GUID (UUID V4):0
References
Schaller, Waldemar Theodore (1903) Minerals from Leona Heights, Alameda County, California. University of California, Department of Geological Sciences Bulletin: 3: 191-217.pp. 195, 212
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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