Luminescent Mechanism of Fluorite “Night Luminescent Bead” and Identification

The physical properties and the luminescence(fluorescence and phosphorescence) of fluorite are discussed in the paper.The phosphorescence is produced by the defects of crystal structure and the luminescent rare-earth elements in the crystal structure.The identification of the "night luminescent bead"(luminescent stone) are analysed.And at the same time,in view of the present confused situation in the identification of "night luminescent bead"(luminescent stone),the proposal of the national standard about "night luminescent bead" is put forward in order to normalize the market of "night luminescent bead".