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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Cooperite from
Snelling placers, Merced River, Snelling, Snelling Mining District, Merced County, California, USA


Locality type:Placer
Classification
Species:Cooperite
Formula:PtS
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cooperite data
Locality Data:Click here to view Snelling placers, Merced River, Snelling, Snelling Mining District, Merced County, California, USA
Data Identifiers
Mindat Occurrence Record ID:679493
Long-form Identifier:1:3:679493:4
GUID (UUID V4):0
References
Sjoberg, J. and Gomes, J.M. (1980) Platinum-group minerals in California alluvial deposits. US Bureau of Mines, Reno Research Center, unpublished manuscript: 15
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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