Abstract: The perthitic feldspars described in this study are in granites of Zhejiang Province in which the perthite textures appear to have formed as a result of a specific sequences of metasomatic events at the deuteric stage of crystallization and in a chemical environment in which K-metasomatism was enrichment. Perthite textures commonly found in potash feldspars in granitic rocks have generally been attributed to one of two well-established modes of occurrence, either exsolution or replacement process.