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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Römerite from
Stayton Mine (Stayton Quicksilver Mine; Pacific claim of Stayton group), Antimony Peak, Stayton Mining District (McLeod Mining District; Panoche Mining District), Merced County, California, USA


Locality type:Mine
Classification
Species:Römerite
Formula:Fe2+Fe23+(SO4)4 · 14H2O
Comments:Occurs as stalactitic masses.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Römerite data
Locality Data:Click here to view Stayton Mine (Stayton Quicksilver Mine; Pacific claim of Stayton group), Antimony Peak, Stayton Mining District (McLeod Mining District; Panoche Mining District), Merced County, California, USA
Data Identifiers
Mindat Occurrence Record ID:680475
Long-form Identifier:1:3:680475:6
GUID (UUID V4):0
References
Anonymous (1958), World news on mineral occurrences: Rocks & Minerals: 33: 195-196
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 324.
 
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