Study on Mineralogical Characteristics and Optical Principle of "Glimmering" Jadeite Jade
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摘要: 采用X射线粉末衍射仪(XRD)、傅里叶变换红外光谱仪(FTIR)、X射线能谱仪(EDS)和扫描电子显微镜(SEM)等测试仪器对目前珠宝市场价值较高的“起荧”翡翠样品进行了矿物学、岩石学研究,并对其“起荧”现象的光学原理进行了初步探讨。研究结果表明,翡翠(包括硬玉质翡翠和绿辉石质翡翠)的“起荧”现象与其化分成分无必要关联。翡翠发生“起荧”现象的必要条件为:1.翡翠饰品应整体或局部被切磨成弧面琢型,其弧面琢型的高度对“起荧”现象的强弱有一定的影响;2.翡翠饰品的表面抛光精良;3.翡翠的矿物颗粒大小基本上在0.05~0.14 mm范围内。Abstract: The mineralogical and petrological characteristics of the "glimmering" jadeite jade samples,which are of high value in the jewelry market at present,are studied by using X-ray powder diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),X-ray energy dispersive spectrometer(EDS) and scanning electron microscopy(SEM).The optical principle of the "glimmering" phenomenon is also primarily discussed.The results show that it is unnecessary relationship between the "glimmering" phenomenon and chemical compositions of the jadeite jade,including jadeitite jade and omphacitic jade.There are some necessary conditions causing the "glimmering" phenomenon for the jadeite jade.One condition is that the whole or partial shape of the jadeite jade product should be cabochon cut,the height of the cut has influence on the intensity of the "glimmering" phenomenon.One is that the surface of the jadeite jade product should be perfectly polished.The other is that the size of the mineral particles in the jadeite jade is basically in the range of 0.05 to 0.14 mm.
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Keywords:
- "glimmering" jadeite jade /
- XRD /
- FTIR /
- EDS /
- SEM
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