当前珠宝市场上的人造黑曜石在外观特征、基本性质、物相组成等方面与天然黑曜石十分接近。这给消费者带来困惑,也给常规检测带来挑战。以天然黑曜石和人造黑曜石为研究对象,采用红外反射光谱法及透射光谱法相结合的方法进行了测试及对比研究。结果表明,两种材料均为“非晶质SiO2类”物质,即玻璃态物质。因形成过程、介质环境不同,在红外光谱指纹区600～1400 cm-1波段内谱带的分裂程度不同; 在特征频率区2600～3700 cm-1波段内,H2O、O-H振动吸收谱带的位置及强度亦有差异。该研究结果为快速、准确、无损地鉴定黑曜石提供了一种新的技术思路。

Nowadays, the artificial imitations of obsidian in jewelry markets are very similar to the natural obsidian in appearance, basic properties and substance composition. This may confuse the consumers and challenge the routine testing. Taking the natural and artificial obsidian as the objects of study, a method which combines the infrared reflectance spectroscopy with the transmission spectroscopy is used to analyze the difference between the natural obsidian and its artificial imitations. The results show that both of them are amorphous SiO2 substances, i.e. vitreous substances. Due to their different formation processes and medium environment, they have different degree of spectral division in the infrared spectral fingerprint region from 600 cm-1 to 1400 cm-1. In the characteristic frequency region from 2600 cm-1 to 3700 cm-1, the position and strength of their H2O and O-H vibration absorption bands are also different. The results provide a new technical idea for the rapid, accurate and non-destructive identification of obsidian.