“水墨画”种翡翠的矿物组成

Mineral Component of“Ink Painting”Jadeite

  • 摘要: “水墨画”种翡翠是近几年翡翠市场中新出现的品种,因其内部的黑色条带构成一定的图案而得名。关于黑色条带的矿物组成,业内人员持有不同的看法。因此,笔者对“水墨画”种翡翠以及黑色条带的矿物组成进行了相关的探讨。通过X射线粉末衍射仪、激光诱导离解光谱仪和拉曼光谱仪对样品的矿物组成及黑色部位进行了测试。结果显示该样品的主要矿物组成为硬玉;而所谓的“水墨画”的黑色条带主要矿物组成为石墨和无定形碳,且以无定形碳为主。通过LIBS测试发现黑色条带中存在C与Fe,但Fe含量较少,因此,造成样品呈现深色外观的主要原因为C。

     

    Abstract: “Ink painting”jadeite,as a new variety of jadeite,emerged in jewelry market in recent years.Scholars have different views about the mineral components of the black inclusions.In this paper,with the help of XRD,LIBS and Raman spectroscopy,chemical compositions and mineral components are tested,and micro-area analysis for the black inclusion is made.In the current testing condition,the authors found that the main mineral component of the sample was jadeite and the main mineral components of the black inclusion were graphite and amorphous carbon.The LIBS testing result showed that the black inclusions contained C and Fe.The content of Fe is too little to affect the appearance of the sample.As a conclusion,the reason for the dark appearance is C.

     

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