Sibelco is a Belgian mineral and metal extraction company. It has over 245 production units worldwide for the extraction, production and distribution of the main industrial minerals quartz, cristobalite, nepheline syenite, plastic clay, and olivine. The company also produces the industrial minerals barite, bentonite, calcite, dolomite, hydromagnesite, kaolin, feldspar, wollastonite, talc and huntite.The company extracts and refines various types of sand and minerals.