The analysis on the geological background

sample observations

mineralogical and geochemical characteristics of Myanmar jadeite jade boulder indicates that the blue fog zone and black crust of the boulder are formed in dipositional diagenetic process under the conditions of certain temperature

pressure and fluid interaction. The hydrolysisdissolution of jadeite and precipitation of chlorite are the main causes of the formation of blue fog zone and black crust. The material sources of chlorite come from hydrolysisdissolution of jadeite

and Fe

Mg and other elements in fluid and sediments. The presence of organic matter may promote the migration and precipitation of Fe

Mg and other materials.