During the formation of jadeite, due to the change of geological environment, some jadeite will contain a certain amount of chromium, which will react with aluminum, magnesium and other elements in jadeite to form purple chromium oxide, thus making jadeite appear purple.
Purple jade is very rare in jade, so it is also called "spring" or "purple" jade. The color of purple jadeite varies from light purple to deep purple, among which "royal purple", "eggplant purple" and "blue purple" are more common.
Because purple jadeite is rare and beautiful in color, its value is usually higher than that of jadeite of other colors. However, the value of purple jade is also affected by planting moisture, transparency, defects and other factors, so it is necessary to comprehensively consider multiple factors to evaluate its value.