Mineral Component of“Ink Painting”Jadeite

“Ink painting”jadeite，as a new variety of jadeite，emerged in jewelry market in recent years.Scholars have different views about the mineral components of the black inclusions.In this paper，with the help of XRD，LIBS and Raman spectroscopy，chemical compositions and mineral components are tested，and micro－area analysis for the black inclusion is made.In the current testing condition，the authors found that the main mineral component of the sample was jadeite and the main mineral components of the black inclusion were graphite and amorphous carbon.The LIBS testing result showed that the black inclusions contained C and Fe.The content of Fe is too little to affect the appearance of the sample.As a conclusion，the reason for the dark appearance is C.