Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China

In recent years, “Jin Gao Yu” that has been traded as a kind of jade appeared in areas the Luonan and Shangnan counties, Shangluo City, Shaanxi Province, attracting attention scholars consumers for its delicate texture warm color. this study, infrared spectroscopy, Raman X-ray diffraction analysis, electron microprobe analysis were used to conduct systematic gemmological test an Yu”. The results show is compact mineral aggregate dominated by dolomite, which contains quartz inclusions. color grayish-white earthy-yellow, refractive index about 1.54, relative density 2.86. Its crystal structure basically same both are trigonal systems with granular crystalloblastic textures. It good crystallinity. recrystallization phenomenon can be seen under polarizing microscope. This study determined species Yu”, improved gemological basic data, provided theoretical basis identification future, and, also, new direction use dolomite.