Mineralogical and gemological characteristics of samples of the Ningqiang coral jade from Ningqiang County of Shannxi Province were identified, analyzed and studied. The results show that the Ningqiang coral jade is a kind of coral fossils formed by the infilling of coral bones and carbonate minerals in its pores, and mainly comprises calcite, with a few other minerals. Its densities vary in the range of 2.71～2.72 g/cm³,with refractive index being 1.50. In spite of its low Moh's hardness, the Ningqiang coral jade is an excellent type of jade due to its fine matrix, various colors and laminations. It is thus held that, with its unique structures and laminations, this kind of jade is suitable for producing plain ornaments and handicrafts.