一种伊利石仿独山玉的宝石学研究  

Study on the Gemological Characteristics of an Illite-imitated Dushan Jade

作　　者：王小莉[1,2] 郭俊刚 马驰[1,2] 王守敬 WANG Xiaoli;GUO Jungang;MA Chi;WANG Shoujing(Zhengzhou Institute of Multi-purpose Utilization of Mineral Resources, CAGS, Zhengzhou 450006, China;China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]国家非金属矿资源综合利用工程技术研究中心,河南郑州450006

出　　处：《矿产保护与利用》2018年第6期70-72,76,共4页Conservation and Utilization of Mineral Resources

基　　金：河南省科技攻关项目(122102310644);中国地质调查局地质调查项目(DD20189263)

摘　　要：为了确定一种仿独山玉样品的真伪,采用薄片鉴定、X射线粉末衍射法和电子探针分析对样品进行了分析测试。测试结果表明,该样品由伊利石和少量的绢云母组成,并不含有斜长石、铬云母等组成独山玉的矿物相,是一种独山玉的仿冒品。此外,结合显微鉴定特征和电子探针分析结果,笔者初步推断该样品所呈现的翠绿色为铁元素致色。这种仿冒品在外观上与独山玉很相似,常规宝石学参数也相似,但前者的硬度低于独山玉的。由于硬度检测属于有损检测,因此,建议检测机构在日常检测工作中结合红外光谱仪进行检测。In order to determine the authenticity of a Dushan jade sample,it was analyzed by thin section identification,XRD powder diffraction and electron probe analysis.The test results showed that the sample was composed of illite and a small amount of sericite without plagioclase,mica and any other mineral phases that constitute Dushan Jade,implying that it was a counterfeit product.In addition,combined with the microscopic identification characteristics and electron probe analysis results,the author preliminarily concluded that the emerald green color present in the sample was due to the coloration of iron element.This counterfeit product is similar in appearance to Dushan Jade,and the conventional gemological parameters are also similar.But the hardness of the former is lower than that of Dushan Jade.Since the hardness test is a lossy test,it is recommended that the testing organization apply the infrared spectrometer for daily inspection.

关 键 词：仿独山玉 伊利石 X射线粉末衍射 红外光谱 电子探针 

分 类 号：TD91[矿业工程—选矿]