In the Himalayan Orogenic Belt, garnets occur as one of the key constituent phases in metapelites as well as one of the important accessory phases in leucogranites or leucosomes in migmatites. Petrographic and geochemical characteristics of garnets from leucogranites suggests that a large portion of Zn was incorporated in garnet and fractional crystallization of plagioclase and zircon is the major factor that regulate the magnitude of negative Eu anomalies and the abundance and rim-ward decreasing pattern of Hf, Y and HREE in magmatic garnet. The results indicate that fine-scale chemical variations in magmatic garnet could serve as another important revenue to unravel the magmatic processes during the crystallization of leucogranitic melts.