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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Whewellite from
Sylvester Mine, Urbeis, Sélestat-Erstein, Bas-Rhin, Grand Est, France


02651490017369977779754.jpg
Whewellite

Sylvester Mine, Urbeis, Sélestat-Erstein, Bas-Rhin, Grand Est, France
02651490017369977779754.jpg
Whewellite

Sylvester Mine, Urbeis, Sélestat-Erstein, Bas-Rhin, Grand Est, France
00468280017363541871881.jpg
Whewellite

Sylvester Mine, Urbeis, Sélestat-Erstein, Bas-Rhin, Grand Est, France
Locality type:Mine
Classification
Species:Whewellite
Formula:Ca(C2O4) · H2O
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Quartz
Tetrahedrite Subgroup
Data
Mineral Data:Click here to view Whewellite data
Locality Data:Click here to view Sylvester Mine, Urbeis, Sélestat-Erstein, Bas-Rhin, Grand Est, France
Data Identifiers
Mindat Occurrence Record ID:11751
Long-form Identifier:1:3:11751:3
GUID (UUID V4):0
References
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
 
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