Scientific research shows that if jewelry contains radioactive substances that exceed the normal value, the radiation dose received by the wearer in one year can exceed the radiation dose limit of a nuclear worker in one year, which will not only easily make the skin and muscles in the wearing part cancerous, but also increase the incidence of lung cancer and breast cancer, especially some inferior jewelry that has not passed the safety inspection, and the radioactive substance content greatly exceeds the national safety standards, which is extremely harmful? Therefore, when buying jewelry, you should go to a reputable store, ask the salesman for the quality certificate of jewelry, and keep the purchase invoice so as to provide a basis for future problems?