陕西洛南石英质玉的宝石学特征

Gemmological Characteristic of Quartz Jade from Luonan, Shanxi Province

  • 摘要: 陕西洛南近期发现了一处颇具特色的石英质玉矿产资源,原石具有紫色、绿色调,具有特征的“绿边红心”环带状的外观,在国内同类玉石中尚属首次发现。采用常规宝石学测试、偏光显微镜观察、红外光谱测试、扫描电子显微镜分析、岩石化学分析等方法,对该区石英质玉的宝石学及矿物学特征进行研究。观察及测试结果表明,洛南石英质玉具隐晶质结构、块状构造,主要矿物组成为颗粒状α-石英,主要化学成分是SiO2,属隐晶质玉髓类玉石。石英质玉抛光面呈玻璃光泽,摩氏硬度约6.5~7.0,密度为2.649~2.788 g/cm3,折射率为1.52~1.55。

     

    Abstract: Recently, a new kind of quartz jade has been discovered in Luonan, Shanxi Province. The jade has purple and green tone, especially green wrapped in red, which is the firstly discovered in the quartz jade. In this paper, the mineral components, microstructure, spectroscopy, micro-area chemical composition characteristics of quartz jade from Luonan, were studied through testing methods like polarizing microscope, Fourier transform infrared spectrometer, scanning electron microscope, petrochemical analysis and conventional gemmological tests. The regular inspection result shows that this quartz jade has cryptocrystalline texture and dense massive structure, and silicon dioxide is main existing as α-SiO2, and the shape of quartz is granular, as a jade which belongs to chalcedony. The quartz jade has vitreous luster, with Moths hardness 6.5-7.0, density 2.649-2.788 g/cm3, refractive index 1.52-1.55.

     

/

返回文章
返回