Recently, a theory which considers that topaz may crystallize directly and mainly from the F_rich acid magma and/or the F-rich magmatic_hydrothermal transition fluid similar to magma in overall nature has given a vigorous challenge to the traditional ideas of single alteration origin for topaz. The high-ltrahigh-pressure metamorphic topaz has been reported time and again. On the basis of geological, geochemical and mineralogical characteristics of topaz-bearing rocks as well as related petrogenetic and metallogenic experimental data, a new petrogenetic and mineral-forming model for topaz has been established. The model does not negate the alteration and metamorphic origin of topaz. The authors hold that it is inadvisable to emphasize the role of metamorphism (including alteration) indiscriminately and exaggerate its ubiquity and its importance to petrogenesis and mineralization.