JP: 天草陶石/あまくさとうせき
A stone, mined around the west coast of Amakusa area, Kumamoto, Japan. It is used as a raw material for making pottery and porcelain. Products made of this material are strong and exhibit beautifully clear colors.
Its high quality makes it possible to create totally pure products without the need to mix with other materials. It is widely used in Japan, as well as in other ceramic-producing countries.
