多米尼加琥珀

Ambers from Dominican Republic

多米尼加不仅是琥珀的主要产地之一,而且是琥珀含生物化石种类最多的产地之一。采用常规的宝石学测试方法,并配合傅里叶变换红外光谱仪、扫描电子显微镜、差热分析等现代测试仪器,对多米尼加琥珀的宝石学特征以及红外吸收光谱、微尺度结构、差热分析曲线等特征进行了分析,并与国内外其它产地琥珀的特征进行了比较研究。结果表明,多米尼加琥珀的颜色较其它产地的丰富,质地较干净;不同产地的琥珀虽具有同样的地质年代,但由于聚合化程度不同,其红外吸收光谱峰的位置和强度存有差异。

Dominican Republic is one of the main localities of ambers which contain the most inclusions of fossil organism. In the paper, the gemmological characteristics, IR absorption spectra, the micro-scale structure and differential thermal analysis thermogram of the ambers from Dominican Republic are tested by using conventional gemmological methods and the modern testing instruments such as infrared Fourier transform spectroscope, scanning electron microscope, differential thermal analysis and so on. At the same time, the ambers from Dominican Republic are also compared with the ambers from the other localities. The results show that the ambers from Dominican Republic are of the more colours and much cleaner in the interior. The ambers from the different localities may be of the same geological age, but exit the different FTIR absorption bands and strength according to the different polymeric grade.