摘要:
以珠宝市场上充填处理海蓝宝石、碧玺等中低档宝石样品为研究对象,采用宝石显微镜与红外光谱测试技术对其充填物的宝石学特征进行了检测与分析。结果表明,蓝色闪光效应、残余扁平状气泡、充填物的流动构造及其碎渣状等宝石学特征有助于鉴别充填处理海蓝宝石和碧玉样品。位于2 962,2 931,2 879cm-1处、由饱和碳氢化合物υ(-CH3-)与υ(-CH2-)的反对称和对称伸缩振动以及位于3 046 cm-1处、中等强度芳香环υ(C-H)的伸缩振动致吸收谱带可有效判断充填处理海蓝宝石;位于2 962,2 927,2 865 cm-1处、由饱和碳氢化合物υ(-CH3-)与υ(-CH2-)的伸缩振动致吸收带可辅助鉴别充填处理碧玺。依据充填物的颜色、形态、相对粘稠状态以及流动迹象等特征推测,不同的充填处理中低档宝石其充填物种类可能有差别。
Abstract:
Recently,the filled semi-precious stone samples such as aquamarine and tourmaline appeared on the jewelry markets are studied,and the gemmological characteristics of their fillings are tested by using the gemmological microscope and infrared spectrum testing technology.The results show that the gemmological characteristics such as the blue flash effect,the residual flat gas bubbles,the flow structures and the slag-like fillings are helpful to identify the filled aquamarine and tourmaline samples.The infrared absorption spectra at 2 962,2 931,2 879 cm-1 caused by the antisymmetric and symmetrical stretching vibration of the saturated hydrocarbons υ(-CH3-)and(-CH2-) and at 3 046 cm-1 caused by the stret-ching vibration of the aromatic nucleus υ(C-H) could be used to identify the filled aquamarine.The infrared absorption spectra at 2 962,2 927,2 865 cm-1caused by the stretching vibration of the saturated hydrocarbons υ(-CH3-) and υ(-CH2-) are accessary to identify the filled tourmaline.It is suggested that the fillings of different filled semi-precious stones could be different by their colour,shape,relatively viscous state and flow features.
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