浙江省非叶蜡石型青田石的宝石学研究

Study on Gemmology of Non-Pyrophyllite-Type Qingtian Stone from Zhejiang Province

浙江青田石究竟属叶蜡石型还是属非叶蜡石型 ?针对这一争议问题 ,采用 X射线粉晶衍射、红外吸收光谱、扫描电子显微镜和差热等测试分析方法对青田石进行了研究。结果表明 ,青田石中多数品种属叶蜡石型 ,新发现有迪开石型、伊利石型和绢云母型等非叶蜡石型品种。就非叶蜡石型青田石的宝石学特征和成玉机理展开讨论。

It is a controversial problem that the type assignment of the Qingtian Stone from Zhejiang Province belongs to the pyrophyllite type or not In order to solve this problem, some measurements such as X ray powder diffraction analysis, infrared absorption spectrum ,scan electron microscope and differential thermal analysis are adopted The results show that the main species of Qingtian Stone are pyrophyllite type, but there also exist some species which are not pyrophyllite type, such as dickite type, illite type, sericite type and so on In this paper, the gem features and mechanism of the Qingtian Stone are discussed.