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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Coffinite from
Bedford, Westchester County, New York, USA


Classification
Species:Coffinite
Formula:U(SiO4) · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Coffinite data
Locality Data:Click here to view Bedford, Westchester County, New York, USA
Data Identifiers
Mindat Occurrence Record ID:307708
Long-form Identifier:1:3:307708:5
GUID (UUID V4):0
References
www.nysam.org
 
and/or  
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