Minerals are found in vesicles in limburgite. Seven quarries exist, all of them are located within a national reserve. Collecting loose boulders is allowed, though.
References:Refs.:
- Rinaldi, R., Smith, J. V. & Jung, G. (1975): Chemistry and paragenesis of faujasite, phillipsite and offretite from Sasbach, Kaiserstuhl, Germany. N. Jb. Mineral. Mh., 1975, 433-443.
- Lapis 1978(3)
- Der Aufschluss 1988(2), 70-73
- Betz, V. (2005): Ein Beitrag zur Morphologie, Paragenese und Geschichte der Zeolithe vom Limberg bei Sasbach/Kaiserstuhl. Der Aufschluss 56, 235-250.
- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 273. [as "Limburg"]
- WEISENBERGER, T. & SPÜRGIN, S. (2009): Zeolites in alkaline rocks of the Kaiserstuhl Volcanic Complex, SW Germany – new microprobe investigation and the relationship of zeolite mineralogy to the host rock. Geologica Belgica, 12, 75-91.
http://popups.ulg.ac.be/Geol/document.php?id=2682
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http://omnibus.uni-freiburg.de/~weisenbt/9Kaiserstuhl/Kaiserstuhl.pdf
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http://www.eschelken.de/Mineralien/Limberg_1/limberg_1.html
and
http://www.eschelken.de/Mineralien/Limberg_2/limberg_2.html
21 entries listed. 14 valid minerals. 2 type localities (valid minerals). 1 erroneous literature entry.