Be扩散处理、 热处理和天然双色昌乐蓝宝石的宝石学特征与鉴别

对中国山东昌乐Be扩散处理、热处理和未处理双色蓝宝石（黄色和蓝色）进行了宝石学常规测试、紫外可见光谱、红外光谱、电子探针和激光剥蚀电感耦合等离子体质谱（LA-ICP-MS）测试，以获得它们的谱学特征，提出其鉴别方法。研究发现Be扩散处理双色蓝宝石仅出现Fe3+—Fe3+形成的紫外可见吸收峰，而且377 nm吸收峰的强度异常高。红外光谱中，热处理和未处理的双色蓝宝石存在明显的3 310 cm-1羟基吸收峰，而该吸收峰在Be扩散处理双色蓝宝石中消失。因此，紫外可见光谱和红外光谱可用于鉴别Be扩散处理、热处理和未处理双色蓝宝石。另外，二碘甲烷浸油实验也可识别Be扩散处理双色蓝宝石。

Abstract

Be-diffused, heated and untreated bicolor sapphires (blue and yellow) from Changle City, Shandong Province, China were studied by using standard gemological methods, ultraviolet-visible (UV-Vis) spectroscopy, infrared (IR) spectroscopy, electron microprobe, and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to obtain the spectra characterization, and to suggest identification methods for them. Only Fe3+—Fe3+ absorption bands formed in ultraviolet region appear in Be-diffused bicolor sapphire, which is especially strong at 377 nm. In IR absorption spectra, absorption peak at 3 310 cm-1 appears in heated and untreated bicolor sapphires, while it disappears in Be-diffused bicolor sapphire. Therefore, UV-Vis and IR absorption spectra can be used to identify Be-diffused, heated and untreated bicolor sapphires. On the other hand, methylene iodide immersion observation also can be used to identify Be-diffused bicolor sapphire.

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陈涛, 杨明星. Be扩散处理、热处理和天然双色昌乐蓝宝石的宝石学特征与鉴别[J]. 光谱学与光谱分析, 2012, 32(3): 651. CHEN Tao, YANG Ming-xing. Gemology Characterization and Identification of Beryllium Diffused, Heated and Untreated Bicolor Sapphires from Changle City, China[J]. Spectroscopy and Spectral Analysis, 2012, 32(3): 651.

Be扩散处理、热处理和天然双色昌乐蓝宝石的宝石学特征与鉴别

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