The spectral characteristics of omphacite jade are analyzed by X-ray fluorescence (XRF),X-ray diffraction (XRD),ultraviolet visible (UV-VIS) and Raman spectroscopy.The result indicates that the content of Ca2+ in omphacite jade sample is high.The result also shows that omphacite jade is mainly composed of omphacite,which has the similar crystal structure to jadeite,but with the different unit cell parameter.The iron,which mainly exists as Fe2+,is of high content.Raman shifts between 683 cm-1 and 1018 cm-1 are due to symmetrical bend vibration of Si-O-Si bond and symmetrical retraction vibration within [SiO4]4- tetrahedral respectively.Therefore,omphacite jade is different from jadeite.