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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Ettringite from
Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany


02906550017272736067858.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
05320580017544027631744.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
00060080017272006098024.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
07880260017272006107362.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
02120530017363539735752.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
02256780017363437766002.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
05745420017363539738671.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
05277350017365029943435.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
02906550017272736067858.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
05320580017544027631744.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
00060080017272006098024.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
07880260017272006107362.jpg
Ettringite

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
Locality type:Mine
Classification
Species:Ettringite
Formula:Ca6Al2(SO4)3(OH)12 · 26H2O
Comments:The ettringite found to date originates from the use of concrete as a constructing material underground. It is not a naturally formed phase.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Agardite-(Ce)1
Pyromorphite1
Data
Mineral Data:Click here to view Ettringite data
Locality Data:Click here to view Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
Photo GalleryView Gallery (18 photos)
Data Identifiers
Mindat Occurrence Record ID:5045
Long-form Identifier:1:3:5045:6
GUID (UUID V4):0
References
Walenta, Kurt (1992) Die Mineralien des Schwarzwaldes und ihre Fundstellen. Christian Weise Verlag. 336 pp.
 
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