Modern high science and technology in today, there are a lot of new and high technology is also introduced to gem industry processing, processing, synthesis, etc. New optimization method variety with new synthetic methods, a new identification problem come pick up '. Traditional, conventional identification instrument and method, has been difficult to solve the identification problem. Abroad in recent years, some large equipment introduction and application of appraisal and research a great help for us, get rid of the appraisal model of single, contrast type, can be intact, convenient and efficient to quantitative and qualitative analysis, jewelry, jade, greatly shortens the time of appraisal and improve the accuracy of the appraisal conclusion. Fourier infrared spectrometer is the present domestic gemstone identification laboratory, one of the most popular, the most widely used qualitative analysis instrument. It can be on the premise of not damage the stone samples, for testing personnel to provide important appraisal parameters. Here we introduce to you a, infrared spectrometer in gemstone identification used in several aspects. The first is the generation of infrared spectrum, gem under the irradiation of infrared light, lead to lattice (molecular), the vibration of the complex anion group and dentate energy level transition occurs, and the corresponding infrared absorption spectrum is called arising from the infrared spectrum. Infrared spectrum is the manifestation of gem internal molecular structure, we can through the observation, gem corresponding characteristic infrared absorption band, wave digital and displacement, the number of spectral shape and band intensity, the band split, helped us to qualitative characterization of infrared absorption spectrum of gem, to obtain relevant gem identification of important parameters.