100% natural volcanic mineral. MINERALOGICAL COMPOSITION Klinoptilolith 90-92%, Feldspar 2-4% Cristobalite 5-7%, Mica 1-2% CHEMICAL COMPOSITION SiO2 65.0 to 71.3% Al2O3 11.5 to 13.1% CaO 2.7 to 5.2% K2O 2.2 to 3.4% Fe2O3 0.7 to 1.9% MgO 0.6 to 1.2% Na2O 0.2 to 1.3% TiO2 0.1 to 0.3%.
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