Kaolin is a mineral belonging to the group of alumina silicates. It is commonly referred to as "China Clay", because it was first discovered at Kao-Lin, in China. The Term kaolin is used to describe a group of relatively common clay minerals dominated by kaolin and derived primarily from the alteration of alkali feldspar and micas. Kaolin is an industrial mineral used primarily as inert Filler and customers combine it with other raw materials in a wide variety of applications.