In this paper,the mineral composition and color-genesis of"Dulong Jade"were examined and analyzed through testing techniques such as infrared absorption spectra,Raman spectra,UV-Vis spectra,ICP-MS and thin section identification.The results indicate that the main mineral of"Dulong jade"is quartz,the secondary minerals are flaky fuchsite,a few schistose fuchsite and pyrite;locally,earthy brown-yellow kaolinite minerals are filled as veinlets along the gaps between quartz particles occasionally.In"Dulong Jade",the transition metals of Cr,Ni,and V are relatively high.The result indicates that the green color of"Dulong Jade"is caused by two sets of electron transition in the octahedral coordination of Cr3+crystal field.This study clarifies the causes of"Dulong Jade"is color distribution,providing references for its the market identification,and provides scientific data for its scientific identification.
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