Guanyin soil is also called kaolin, swelling rock, bentonite, sweet soil, bentonite, clay and white mud. Guanyin soil is rich in minerals such as silicon, zinc, magnesium and aluminum. It is a clay mineral with stable chemical composition, so it is called "universal stone".

Guanyin soil can satisfy hunger, but it cannot be digested and absorbed by human body. After eating it, it is abdominal distension, difficulty in defecation, and a small amount is not fatal. Although you won't be hungry, people will die because of lack of nutrition. Guanyin soil was generally used as food by hungry people during the famine, and it was temporarily relieved after eating it.

Extended data:

Guanyin mud is an important raw material for ceramic body, glaze and clay refractory.

Guanyin mud has now become a general term for porcelain-making raw materials all over the world. In other words, "Guanyin soil" is the unified name of similar clay in the world, and it is a great contribution of China porcelain workers to the world.

reference data

Guanyin soil (raw material of ceramic products) _ Baidu Encyclopedia