Abstract: According to the feature of chemical composition, we can define that archaic-jade artifacts with chicken boon-like colour from Lingjiatan are nephrite. The chemical composition of the nephrite from Lingjiatan is about the same as white nephrite and greenish white nephrite of Hetian, Xinjiang. We deduce the original material of archaic-jade artifacts with chicken boon-like colour is white jade and light greenish-greyjade. The genesis of nephrite from Ling jiatan belongs to mafic marble type.