There is a record of medical stone in Compendium of Materia Medica.

The water soaked in medical stone, if drunk for a long time, can supplement minerals and trace elements needed by the human body, help to eliminate harmful substances in the body, promote blood circulation and treat various skin diseases.

The water soaked in medical stone and the steamed rice are sweet and delicious.

Medical stone can adsorb harmful substances such as mercury, cadmium, cyanide and various bacteria, purify water and air, and keep fresh. Put a small piece of medical stone, and the smell left in the refrigerator will disappear after 20 minutes.