INDUSTRIAL MINERALS, NAMELY, NATURAL AND BLENDED INDUSTRIAL CLAYS, INDUSTRIAL SAND, INDUSTRIAL QUARTZ, SILICA FILLERS AND AGGREGATES, GROUND INDUSTRIAL SILICA, MICROCRYSTALLINE SILICA, TRIPOLI, QUARTZ, NEPHELINE SYENITE, METALLURGICAL FLUXES, SODIUM, POTASSIUM, FELDSPAR, INDUSTRIAL OLIVINE, DOLOMITE, LIMESTONE, HYDRATED LIME, CALCIUM CARBONATE, MICA, TALC AND ZIRCON