This product is the tooth fossil of ancient mammals. It can be collected when mining Fossil Bone. They are in the shape of complete teeth or broken and irregular blocks. The complete ones can be divided into canine teeth and molar teeth. The canine teeth are conical, and the molar teeth are cylindrical or square-cylindrical, with many grooves and edges of different depths. The blue-grey ones are called "green dragon's teeth", and the yellow-white ones are called "white dragon's teeth". The enamel (enamel layer) has a shiny surface, is hard, and has a rough and uneven cross-section. Odorless and tasteless. The green dragon's teeth are of better quality. The nature, flavor and function are the same as Fossil Bone, but the power of setting heart and calming mind is stronger. It is more suitable for fright epilepsy, madness, dysphoria insomnia. Decoct 10 to 15 grams and take it first.