Clay is a natural mineral composed of extremely fine particles of silicates and several trace elements. The clays may exhibit different types and concentrations of metals such as titanium, magnesium, copper, zinc, aluminum, calcium, potassium, nickel, manganese, lithium, sodium, and iron.

Clays are derived from sedimentary rocks (feldspar) that have undergone the process of erosion and exposure to climate processes for thousands of years. During this process, these fragments of rock break off and absorb characteristic metals and components of the land. The fragments can also be weathered by water from nearby rivers and organic compounds in each micro-region, thus forming the mineral product that is known as clay.