 Founded in 1970, Unimin is one of North America’s largest producers of non-metallic industrial minerals.Unimin is the world’s leading producer of quartz proppants (frac sand) and a major producer of resin coated sand proppants for oil and natural gas stimulation and recovery, and the largest producer of low-iron nepheline syenite for glass, ceramic, paint and plastic applications.The Company is also the world’s leading producer of high purity quartz, a highly specialized product used in the fabrication of integrated circuits, solar photovoltaic cells and high intensity lighting.