Inorganic pigments are widely used in the decoration of Buddhist statues.However,they may suffer from color changes due to environmental factors.In this study,various analytical techniques such as ultra depth of field microscope,SEM-EDS,X-ray diffraction analysis,and Raman spectroscopy are employed to analyze the painted pigments on the headdress of the Buddha statue in Cave 171 of Bingling Temple.The results reveal the presence of not only common pigments like iron red and carbon black but also a relatively rare black pigment known as black copper ore.Finally,the reasons and sources for the existence of this pigment are discussed,providing important information for future research on black pigments.