Based on field geological observation, nearly hundreds of Qingtian Stones which belong to more than forty types were tested by such means as normal gemological identification, X-ray powder diffraction, and infrared spectrum. The results show that there are a great variety of mineral compositions and groups in Qingtian Stones. Most Qingtian Stones belong to pyrophyllite type, together with minor illite type, dickite type and sericite type.