莫桑比克天河石的宝石学特征

孟国强, 陈美华, 王雅玫

孟国强, 陈美华, 王雅玫. 莫桑比克天河石的宝石学特征[J]. 宝石和宝石学杂志, 2016, 18(4): 28-32.
引用本文: 孟国强, 陈美华, 王雅玫. 莫桑比克天河石的宝石学特征[J]. 宝石和宝石学杂志, 2016, 18(4): 28-32.
MENG Guoqiang, CHEN Meihua, WANG Yamei. Gemmological Characteristic of Amazonite from Mozambique[J]. Journal of Gems & Gemmology, 2016, 18(4): 28-32.
Citation: MENG Guoqiang, CHEN Meihua, WANG Yamei. Gemmological Characteristic of Amazonite from Mozambique[J]. Journal of Gems & Gemmology, 2016, 18(4): 28-32.

莫桑比克天河石的宝石学特征

基金项目: 

中国地质大学(武汉)珠宝检测技术创新中心开放基金(文章编号CIGTXM-2016006)

详细信息
    作者简介:

    孟国强(1991-),男,硕士研究生,主要从事宝石学研究。

    通讯作者:

    陈美华(1966-),男,教授,主要从事珠宝教学及研究工作。E-mail:mhchengp@126.com

  • 中图分类号: TS93

Gemmological Characteristic of Amazonite from Mozambique

  • 摘要: 以莫桑比克宝石级艳蓝绿色天河石为研究对象,利用偏光显微镜、拉曼光谱、电感耦合等离子体质谱仪和环境扫描电镜等测试技术对其宝石学特征进行测试与分析。莫桑比克天河石样品主要由钾长石和钠长石两种矿物组成;其中蓝绿色区域主要是钾长石,白色区域主要是钠长石;钾长石和钠长石有规律的交生在一起;依据近代宝石学颜色成因理论,天河石的颜色成因主要有两种观点:(1) Rb和Cs以类质同象替代晶体结构中的K产生色心致色;(2) Pb以类质同象替代晶体结构中的K产生色心致色。通过ICP-MS测试发现莫桑比克天河石中蓝绿色区域和白色区域Rb、Cs、Pb在含量上存在明显差异,推测天河石的致色原因可能是Rb、Cs、Pb中的某一种或者两种元素以类质同象替代天河石晶体结构中的K,从而引起结构缺陷,产生色心而形成蓝绿色。
    Abstract: In the paper, the gemmological characteristics of gem grade blue-green amazonite sample from Mozambique were tested by using the polarizing microscope, Raman spectrum, inductively coupled plasma mass spectrometer and environmental scanning electron microscopy.The result showed that the amazonite sample from Mozambique is primarily composed of potassium feldspar and albite.The blue-green part of amazonite is mainly composed of potassium feldspar and the white part is mainly composed of albite.Potassium feldspar and albite intergrowth together regularly.Based on the theory of modern gemmology colour formation,there are two main views about the colour cause of amazonite.(1) Rb and Cs elements take the place of K element, which form colour heart; (2) Pb element takes the place of K element which form colour heart.Though ICP-MS, we found that the content of Rb、Cs、Pb elements in the blue-green part and the white part of amazonite sample from Mozambique are different.The colour cause of amazonite sample from Mozambique was discussed that one or two elements of Rb、Cs、Pb take the place of K element which is such quality as alternative in the crystal structure of amazonite, leading to structural defects, forming colour heart.
  • [1] 樊行昭,游益彬.山西交城西榆皮天河石呈色机理的研究[J].太原理工大学学报,2004,35(1):89-91.
    [2]

    Correcher V, Garcia-Guinea J.Study of the luminescence properties of a natural amazonite[J].Radiation Measurements, 2011(46):971-974.

    [3] 崔云昊.天河石颜色之谜[J].地球,1985(4):27-28.
    [4] 叶水泉,黄建平,夏明飞.莫桑比克阿尔特里哥纳伟晶岩区概貌[J].江苏地质,2006, 30(1):10-12.
    [5] 董伟霞,顾幸永.长石矿物及其应用[M].北京:化学工业出版社,2010:36-48.
    [6] 董俊卿,干福熹,李青会,等.我国古代两种珍稀宝玉石文物分析[J].宝石和宝石学杂志,2011, 13(3):46-52.
    [7] 才文博,赵以辛.长石-造岩矿物中最常见的宝石矿物[J].吉林地质,1989(2):84-88.
    [8] 潘兆橹.结晶学及矿物学(上册)[M].北京:地质出版社,1998:176-179.
    [9] 钟华邦.美丽的天河石[J].中国宝玉石,1995(3):32.
    [10] 张永旺,曾溅辉, 刘琰,等.周口店花岗闪长岩中斜长石晶体化学及谱学特征研究[J].光谱学与光谱分析,2009, 29(9):2480-2484.
    [11]

    Julg A.A theoretical study of the absorption spectra of Pb+ and Pb3+ in site K+ of microcline:Application to the color of amazonite[J].Physics & Chemistry of Minerals, 1998, 25(25):229-233.

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出版历程
  • 收稿日期:  2016-04-04
  • 刊出日期:  2021-09-08

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