Gemmological Characteristics of Light Pink to Pink Beryls
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摘要: 以前珠宝市场上粉色系列绿柱石并不常见，近期发现粉色绿柱石数量增加，笔者对彩宝市场上的浅粉红色—粉红色绿柱石进行了宝石学特征研究。浅粉红色—粉红色这一系列的绿柱石与以前研究较多的祖母绿、海蓝宝石相比，颜色明显不同，在折射率、密度等方面也存在一定的差别。通过常规宝石仪器，红外光谱仪，X射线荧光能谱仪对这一系列绿柱石进行测试分析，对比发现其与常见的海蓝宝石存在一些差异；本文按照粉色绿柱石测试的折射率的结果分为A、B、C 3组，将同时检测的黄绿色绿柱石和常见的海蓝宝石分成2组，发现浅粉红色—粉红色绿柱石的折射率与密度存在正相关性，而且随着Cs元素替代的增加，Rb元素替代的减少，折射率与密度升高，粉红色绿柱石的折射率可高达1.61。Abstract: In this paper，the gemmological characteristics of light pink to pink beryl samples from jewelry market were studied.Compared to emerald and aquamarine，the colour of light pink to pink beryls is obviously different，as well as different refractive index and density.Conventional gemmological instruments，infrared spectrometer and X－ray fluorescence spectrometer were used to systematically study the pink beryl samples.According to the refractive index results，the pink beryls are divided into three groups，and the yellowish green beryls and common aquamarines are divided into two groups.It is found that the refractive index and density of pink beryl are positively correlated.As the concentration of Cs increases and the concentration of Rb decreases，the refractive index and density increase.The refractive index of aquamarine varies between 1.577and 1.583（±0.017），while the refractive index of pink beryl is up to 1.61.
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Keywords:
- pink beryl /
- infrared spectrum /
- gemmological characteristic
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