The gem itself is harmless. Liu said that in order to improve the appearance of some gems, high-energy electron accelerators can be used for radiation treatment to activate trace elements into isotopes, thus changing colors and raising their prices. For example, light blue and inexpensive topaz can be turned into very expensive natural aquamarine after radioactive treatment.
However, some of this irradiated ore can only be worn after a year and a half of decay, and its radioactivity is reduced to a safe dose that the human body can bear. Some of them need three to five years or even longer to meet the requirements of human security. If the gem fails to pass the radioactive safety test, it will be harmful to the body when worn.