The mackerel stone is crystal clear, such as jade, in addition to being used to play and appreciate, but also a folk remedy. According to legend, mackerel stone is rumored to have the evil spirits, prevent children from fright, the role of Nafu Na Luck, so the name of the fish surprised stone. In folk customs, large mackerel are often salted into dried mackerel as a New Year's gift. In the process of drowning, salt a week or two after trying to take the fish stone, salty flavor into the small children in case of panic when given the initiative to suck, adults in case of fear of feeling contained under the tongue, often can be immediately stop its bad feeling. Some people believe that may play a role is still psychological factors.

But from the point of view of Chinese medicine, the analyses, the Qingyu stone may indeed be justified in the role of sedation. It is expected that rhinoceros horn, antelope horn and ox horn and other horns have a very good sedative cool blood, detoxification and other effects. And mackerel stone main component is also keratin, so mackerel stone may indeed have a similar effect. Of course, to further confirm, but also need scientific research support. I have not yet found the relevant research information, so this is speculation, to wait for the evidence.