优化处理绿松石的大量面市, 给绿松石的鉴定带来了挑战。 通过激光拉曼光谱测试分析、 压制及人工注塑处理绿松石为研究对象, 对优化处理绿松石的激光拉曼光谱特征进行了研究。 结果表明, 拉曼光谱技术是一种有效鉴别绿松石及其处理品的无损检测方法, OH, H2O, PO4 及CH2基团的振动模式和频率决定了优化处理绿松石的激光拉曼光谱特征。 优化处理绿松石除具绿松石典型拉曼光谱特征外, 在2 937和2 883 cm-1处普遍出现一组具鉴定意义的由外来添加物中CH2伸缩振动及CH2弯曲振动致拉曼谱带。 依据这些特征拉曼谱带, 有助于将天然绿松石与优化处理品区分开。 该研究为快速、 准确、 无损鉴别绿松石提供了一种新思路。

Due to a variety of the enhancement and treatment turquoises discovered in gem markets, the identification of turquoise is becoming more and more difficult. By using laser Raman spectroscopy analysis, the characteristics of Raman spectra of the pressed and filled turquoises were studied. The results show that laser Raman spectroscopy is an effective technique to identify the enhancement and treatment turquoises and the natural ones, moreover, it’s a non-destructive testing method. The Raman spectra of the enhancement and treatment turquoises are resulted mainly from the vibrational mode and frequency of water, hydroxyl units, PO4 tetrahedron and CH2 units. Besides, they have the characteristic Raman spectra peaks at 2 937, 2 883 and 1 451 cm-1 which are attributed to the stretching vibration and the bending vibration of CH2, respectively. These characteristic Raman vibration bands, it will help to distinguish the natural turquoises and the treatment ones. The study provides a new train of thought on the rapid, accurate, and non-destructive identification of turquoise.