A Pr3+ -doped transparent oxyfluoride glass-ceramic containing Ca 5 (PO 4 ) 3 F nanocrystals was prepared by melt quenching and subsequent thermal treatment. The crystallization phase and morphology of the Ca 5 (PO 4 ) 3 F nanocrystals were investigated by X-ray diffraction and transmission electron microscope, respectively. The volume fraction of the Ca 5 (PO 4 ) 3 F nanocrystals in the glass-ceramic is about 10% and the fraction of Pr 3+ ions incorporated into the Ca 5 (PO 4 ) 3 F nanocrystals is about 22%. The peak absorption cross sections at 435 and 574 nm increase up to 128% and 132% after crystallization, respectively. The peak stimulated emission cross sections of the 3 P 0 ?3 H 4 blue laser channel and 3 P 0 ?3 F 2 red laser channel for the glass-ceramic are 4.95 3 10 À20 and 29.8 3 10 À20 cm 2 , respectively. The spectral properties indicate that the glassceramic is a potential visible laser material.