【Abstract】 This article mainly discusses the color feature and chromaticity of Hetian Jade.According to the analyzing of the visible spectrum of Hetian Jade,it comes to the conclusion that the verdant color of Hetian Jade depends on total iron content.The absorption peak at 450 nm is produced by the d—d transition of Fe 3+ , the broad and weak bands at 640 nm can be attributed to the transition spectrum caused by Fe 2+ →Fe 3+ charge transfer.The color indexes of Hetian Jade are calculated by the reflectivity and transmission ratio,and it shows that Hetian Jade has a low saturation and low brightness.更多还原