优化处理祖母绿的鉴定方法

对天然及优化处理祖母绿的鉴定方法进行研究和分析。通过传统的显微放大方法观察祖母绿的充填及染色处理痕迹,证明了该方法是鉴别处理祖母绿的一个首选和重要的手段;进一步采用DiamondViewTM对这些样品用进行观察,发现充填裂隙主要呈浅黄绿色荧光,同时可以确定一些宝石显微镜下无法辨别的裂隙,因而可以作为进一步的验证手段。最后通过傅里叶变换红外光谱仪检测有无2 870 cm-1、2 925 cm-1、2 964 cm-1、3 034 cm-1、3 053 cm-1充填胶特征吸收峰以及激光拉曼光谱仪检测有无548 cm-1铬特征峰和1 602 cm-1、1 180 cm-1、1 107 cm-1、817 cm-1、633 cm-1充填胶特征峰来综合判定祖母绿是否经染色或充填胶处理。确立了快速、有效、准确鉴别处理祖母绿的流程和方法,此方法的确立对此类宝石样品的鉴定有着重要的指导意义。

Study on identification methods of treated emerald

This paper focuses on studying the identification methods of natural, optimized and treated emerald. First microscopy was used to observe whether there is filling fissures and whether the emerald was dyed. And this study also demonstrates that the traditional method of magnification observation is used to a primary and important means of dealing with emerald; then these samples were observed with DiamondViewTM, filling fissures are found show pale yellow-green fluorescence, and fissures which cannot be distinguish under the microscopy also was notarized. So DiamondViewTM can be used as a further means of verification. Finally, Fourier transform infrared spectroscopy for detecting 2 870 cm-1, 2 925 cm-1, 2 964 cm-1, 3 034 cm-1, 3 053 cm-1 characteristic absorption of glue, and Raman spectroscopy for detecting 548 cm-1 characteristic peaks of chromium and 1 602 cm-1, 1 180 cm-1, 1 107 cm-1, 817 cm-1, 633 cm-1 characteristic peaks of glue was finally used to determine whether the emerald was treated or not. Through these studies, a fast, efficient and accurate identification process for emeralds identification was established, and this method has an important guiding significance for future identification work.