Gemologists are attracted by Ximu jade from Ximu Town in Liaoning Province for its fine structure. In this study, microscope, XRD, EMPA, FTIR, Raman and XRF were used to investigate the jade. It is found that the Ximu jade is an almost monomineralic rock, consisting mainly of tremolite with fibrous interlock structure. The green color is related to the Fe ion:with the increase of Fe ion content, the color becomes darker.