Operation since 1970, Unimin Corporation is one of the leading producers of nonmetallic industrial minerals in the North America. Located in Ione, Calif., the company offers an array of products, such as quartz, feldspar, olivine, calcium carbonate, clay, kaolin, lime and limestone, to name a few. It also provides a range of industrial, commercial and manufacturing applications. Unimin Corporation caters to glass, ceramic, lighting, natural gas, paint, plastic, rubber manufacturing industries. Moreover, it supplies products to the metallurgical and foundry industries.