In recent years, Russian green nephrite has entered Chinese market. Its gorgeous green color and nice quality are favored by many customers. In the previous study of Russian green nephrite, most samples were collected from the market, and hence the location wasn't specific; in addition, the study of the "water line" and "cat eyes" was very insufficient. Based on previous studies, the authors employed EMPA and LA-ICP-MS to study the mineralogy of green nephrite from Ospinsk of Russia and, on such a basis, discussed its color influencing ions. The results show that the main mineral composition of Ospinsk green nephrite is tremolite, and the black spotted impurities turn out to be chromite, surrounded by chlorite. The "water line" is composed of tremolite as well. Ospinsk green nephrite's brilliant green hue is mainly related to Cr element content, which can assume bright green color in 400～1 500 μg/g.