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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Greenalite from
Iron County, Michigan, USA


Locality type:County
Classification
Species:Greenalite
Formula:(Fe2+,Fe3+)2-3Si2O5(OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Greenalite data
Locality Data:Click here to view Iron County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:162155
Long-form Identifier:1:3:162155:6
GUID (UUID V4):0
References
Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
 
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