Mineralogical Characteristics and Coloration of the Red Series'Guifeiliao'Chicken Blood Jade in Longsheng,Guilin
Guilin Longsheng Chicken Blood Jade is a new type of quartz jade.Commercially,the variety with good jadeization degree is'Guifeiliao'Chicken Blood Jade.In this paper,different red series(pink,pink purple and red with different hues)'Guifeiliao'Chicken Blood Jade were used as the research object.The mineralogical characteristics and color genesis of the jade were studied by using conventional gemological in-struments,polarizing microscope,electron probe,X-ray fluorescence spectrometer,inductively coupled plasma mass spectrometer and ultraviolet-visible spectroscopy.The results show that the'Guifeiliao'Chick-en Blood Jade is mainly composed of quartz particles with a particle size of about 60 pm,accounting for more than 86％of the total content.Under enlarged observation,pink and red princess'Guifeiliao'contain color-able hematite,goethite and amorphous hydrated iron oxide.Hematite in pink'Guifeiliao'only exists in the form of dust,and its content is less than 0.5％.The hematite in the red'Guifeiliao'sample exists in the form of dust,scaly and disseminated,and the content is about 0.5％-1％.With the increase of the con-tent,the color of the Chicken Blood Jade is redder.In addition,the analysis results of ultraviolet-visible ab-sorption spectroscopy further indicate that the pink'Guifeiliao'is also affected by Mn ions,and carbonate is the main mineral of Mn ions.Pink purple Chicken Blood Jade almost does not contain coloring minerals,which is speculated to be related to impurity elements.
万方数据
