The colour of jadeite jade is one of the important linkages for evaluation of quality and value of jadeite jade.In recent years,scholars have carried out many studies on the evaluation of jadeite jade colour and have made certain achievements.However,these achievements have obviously not been applied or promoted in the market,because these evaluations are based on instrument indexes.This research is based on the principle of colorimetry,using the HSL colour space model as the theoretical basis.Under the 5 5...