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  • Our Montmorillonite Illite Mineral Clay is mined exclusively in Germany and has a very high amount of montmorillonite and illite. The crushed rocks are finely grind up, with an average grain size of 7 microns and a range of about 1 to 25 microns. At least 80% clay minerals: montmorillonite, illite, muscovite, kaolinite, chlorite. Other minerals: quartz, feldspar, calcite, dolomite, pyrite. EU-approved quality.