天然祖母绿、合成祖母绿和绿色绿柱石颜色的对比研究

COMPARATIVE STUDY ON THE COLOR OF NATURAL EMERALD,SYNTHETIC EMERALD AND GREEN BERYL

天然祖母绿、合成祖母绿、绿色绿柱石在成分和外观上有一定的相似性。为了探讨这三种宝石在颜色和成分上的差异，对其进行了对比研究。电子探针分析表明，三者颜色与微量元素铬、钒有关．MPV-3显微光度计下对颜色定量测量的结果表明，三者的视觉透过车、兴奋纯度、主波长和可见光吸收光谱等方面的差别较大。这些差别的存在导致了宝石在颜色的色调、饱和度和明亮程度上的不同。

Natural emerald, synthetic emerald and Sreen beryl sometimes have similar appearance. Au- thor analpees them by electron microscopy and visible light spectrometer in order to determine the differ- ence among them in chemical composition and color indexes' The result shows that their colors are relat- ed to the c0ncentration of trace elements, Cr and V ; the color index of each one is characteristic.