In this study, the authors investigated the radioactivity of 43 kinds of jewelry jades, such as diamond, corundum, tourmaline, emeralds, pearl and coral by means of multi-channel low background high-purity germanium gamma spectrometer so as to obtain natural radioactive nuclide activity values of ²²⁶Ra, ²³²Th, ⁴⁰K in these samples. The measurement data clearly show that all samples have very low levels of radioactive specific activity. I_Ra and I_γ of all the samples are far below the national limit of radioactivity in building materials. Artificial irradiated gemstones present a higher activity than almost all gemstones without irradiation.