The white color of the mineral can either be naturally occurring, or can result after processing by removing clay particles from silica & other compounds by sedimentation process. Kaolin deposit consists of various types of raw kaolin having yield content from 8 to 30% of clay particles rest being silica sand. The small particle size of the clay contributes to its white color by scattering light.

Although kaolin is found throughout the world, deposits with suitable whiteness, plasticity, viscosity and other favorable characteristics are rare. Ironically, the one of the best deposits are located in India.