黑色合成碳硅石在群镶钻石首饰中的鉴定特征

近期,在珠宝市场上的一件＂黑白钻＂首饰中发现混有黑色合成碳硅石,该情况应引起国内外各珠宝检测机构的足够重视。采用宝石显微镜、红外光谱仪和拉曼光谱仪等测试方法对黑色合成碳硅石样品做了较详细测试与分析。结果显示,放大检查可见黑色合成碳硅石的表面粗糙,棱角圆钝,并伴有各种生长缺陷,部分可见残留的单晶硅;黑色合成碳硅石的红外反射光谱非常特征,且其拉曼散射光谱也缺失钻石位于1 332cm-1处的特征峰,可与黑色钻石相区别。

Identification of Black Synthetic Moissanites in Diamond Jewelry with Cluster Setting

Recently,black synthetic moissanites are found in a piece of diamond jewelry consisting of black diamonds and colourless diamonds in jewelry market.The similar diamond jewelry samples should be paid attention to for domestic and international gemstone testing organizations.The black synthetic moissanites are tested systematically by using the gemmological microscope,infrared spectrometer and Raman spectrometer.The results show that the black synthetic moissanites are of rough surface,round blunt edges,growth detect and crystalline silicon inclusions.The infrared reflection spectra of the black synthetic moissanites are entirely different from that of black diamonds,as well as the Raman scattering spectra with the lack of 1 332 cm-1 which is the characteristic peak of diamond.