Abstract:Mineralogical characteristics of some typical varieties of Qingtian Stone were studied by such means as electron microprobe analysis, X-ray powder diffraction analysis and infrared absorption spectroscopy. It is found that chemical composition of Fengmen Qingtian Stone is characterized by rich alkali and Al and poor Si. The blue part of Landing Stone is composed of microcrystalline corundum. Lanhuaxing and Ziluolan Qingtian Stones have a complex mineral association: the blue or purple parts in the stones are dumortierite, the light white and rosy spots are andalusite, and the transparent spots are kaolinite. Shanpaolü is composed of chromian sericite instead of pyrophyllite, with a little quartz, pyrite, andalusite and illite. Its vivid green color is attributed to Cr. It should therefore be a new variety of carving stone.