昌化明矾石石英地鸡血石的宝石矿物学特征

Gemmological and Mineralogical Characteristics of Chicken-blood Stone of Alunite and Quartz“Di”from Changhua

摘要: 利用宝石学常规手段、偏反光显微镜、红外光谱仪、X射线粉末衍射仪和X荧光光谱仪等测试方法对昌化明矾石石英地鸡血石的宝石矿物学特征进行了较详细的分析。结果发现, 该品种鸡血石中的“地”主要由明矾石和石英组成, 并含少量的黄铁矿和镜铁矿, 不含地开石和高岭石。据其透明度、光泽、硬度等特征应归属于“刚地”鸡血石, 但其矿物组成明显不同于其它含有粘土矿物的昌化“刚地”鸡血石。X荧光光谱仪的测试结果显示, 样品中含有一定量的Sr和Ba, 推测其可能含有少量的天青石-重晶石的类质同象系列矿物。

Abstract: Gemmological and mineralogical characteristics of the chicken-blood stone of alunite and quartz“Di”from Changhua are studied by using conventional gemmological methods, polarization-reflection microscope, IR, XRD, XRF.The results show that the“Di”of the chicken-blood stone is mainly composed of alunite and quartz with minor amounts of pyrite and specularite, without dickite and kaolinite.X-ray fluorescence spectrometer shows that the sample contains a certain amount of Sr and Ba.Thus it can be inferred that the sample may contain lapis lazuli-barite isomorphism.