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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Iceland Spar from
Unnamed mine, Sand Pass Mining District, Washoe County, Nevada, USA


Classification
Species:Calcite var: Iceland Spar
Formula:CaCO3
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Iceland Spar data
Locality Data:Click here to view Unnamed mine, Sand Pass Mining District, Washoe County, Nevada, USA
Data Identifiers
Mindat Occurrence Record ID:280478
Long-form Identifier:1:3:280478:1
GUID (UUID V4):0
References
Castor, Stephen B.; Ferdock, Gregory C. (2004) Minerals of Nevada. Special Publication 31. Nevada Bureau of Mines and Geology 512pp.
 
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