In this paper, a new nephrite deposit was reported from Sangpiyu Village of Xiuyan County, and an analysis of its gemological characteristics, mineral assemblage, chemical composition was carried out. Modern techniques such as microscope, electron microprobe analysis, chemical analysis, and isotope analysis were employed. The results show that the nephrite from Sangpiyu is mainly composed of tremolite (> 94%), with minor apatite, chlorite, epidote, serpentine, calcite and limonite. Tremolite texture is characterized by microcrystalline-cryptocrystalline aggregates. It is concluded that the nephrite deposit in Sangpiyu Village is a kind of metamorphic hydrothermal deposit.