漂白充填海蓝宝石的特征与鉴定

Characteristic and Identification of Bleached and Filled Aquamarine

对宝石加工厂和珠宝市场上采集的海蓝宝石样品进行常规宝石学特征、红外光谱、发光图像等测试分析,结果表明:放大检查可见样品内部出现蓝色闪光和气泡,红外光谱在2879、2932、2962、3035、3055 cm^(-1)附近出现一组与环氧树脂相关的吸收峰,指示样品经过了充填;放大检查可见样品表面出现龟裂纹,DiamondView TM下发光图像显示蓝白色荧光纵横交错密布于样品中,显微红外测试切片样品中心区域可见2879、2932、2962、3035、3055 cm^(-1)附近与环氧树脂相关的吸收峰,指示样品结构被破坏,且充填程度严重。此类样品根据国家标准GB/T 16552-2017《珠宝玉石名称》应定名为“漂白充填海蓝宝石”。

The aquamarine samples were collected from gem factories and jewelry markets,and the gemmological characteristics,infrared spectra and fluorescence images were tested and analyzed.The results showed that blue flashes and bubles can be seen in the sample when magnified.Infrared spectra showed a group of absorption peaks related to epoxy resin near 2879,2932,2962,3035 cm^(-1) and 3055 cm^(-1) indicating that the samples have been filled.Through magnification,cracks can be seen on the surface of the samples.The fluorescence images under DiamondView^(TM) showed that bluish white fluorescence interlaces densely in the sample.The micro-infrared spectra showed the absorption peaks related to epoxy resin in the central area of sample slices,indicating that the sample structure was damaged and the filling degree was serious.Such samples should be named“bleached and filled aquamarine”according to the China national standard Gems-Nomenclature.