Blue needle-like dumortierite can be regarded as the rare mineral inclusions in crystal. Gem microscope, micro-X-ray fluorescence spectrometer, micro-Fourier transform infrared spectrometer (FTIR) and micro-confocal Raman spectrometer are used to test and analyze the blue needle-like dumortierite in crystal as well as the morphology and color distribution of blue inclusions in dyed crystal. The corresponding spectral and morphological features can be used for analysis and identification of crystals and internal blue needle-like inclusions.