祖母绿中充填裂隙的鉴别方法——以DiamondView^(TM)为例

Identification Method of Filled Emerald: Taking DiamondView^(TM) for Example

针对目前市场上普遍存在的祖母绿充填裂隙和裂隙难以区分的情况进行讨论,主要分析了祖母绿中裂隙及其充填物在DiamondViewTM下的特征荧光图像。通过激光拉曼光谱、红外光谱和显微镜观察等测试方法对祖母绿样品进行分析,结果认为,在显微放大观察下不易察觉或观察后怀疑有经过充填的裂隙,使用DiamondViewTM可以清晰地观察显微镜下不易察觉的细小裂隙,同时裂隙中的充填物显示浅黄绿色荧光,与未经充填的裂隙发蓝白色荧光区别明显,从而准确地判定裂隙是否经过充填以及充填物的位置。结果表明,DiamondViewTM是除了显微镜以外,能快速准确地帮助判定祖母绿是否充填的有效工具,从而提高了日常检测工作的效率和准确性。

As the resource is exhausted at home and abroad, emerald becomes more and more rare and precious gemstones. Fissures and inclusions commonly exist in emerald, which seri- ously affect appearance and price of emerald. Therefore, the fissures are usually filled by the materials being a similar refractive index to that of emerald, such as oils, resins and green dye, etc, which could reduce the visibility of the fissures and improve the appearance and du- rability of emerald. Sometimes, filling is very little and fissure is small and dispersive,which could not he easily found by using gem microscope. So the fluorescence characteristics of fis- sures and fillings in emerald samples are observed under DiamondViewTM. What＇s more, 12 pieces of emerald samples are tested by Raman spectrometer, infrared spectrometer and gem microscope in order to verify whether the emerald samples have been filled or not. The re- suits show that DiamondViewTM is an effective tool to identify filled emeralds, and improves the efficiency and accuracy of routine work, which provides usefull informaton for identifying the components of fillings by infrared spetrometer and Raman spectrometer.