China Clay is also known as hydrated aluminium silicate. China clay is an important raw material of ceramic industry. In consists of Partly Crystalline and party amorphous minerals of Kaoline group. So it can also be called as Kaolinite is derived from Kaoline Which is a corruption of the Chinese Hauling meaning high ridge. In short china clay is the deposits of kaoline produced by hydrothermal decomposition or weathering of feldspar.