田黄的矿物组成及鉴别

Mineral Components of Tianhuang and Its Identification

本文收集了228个寿山石和40个田黄样品的矿物组成研究成果,并对资料进行了统计和分析。研究表明,在寿山石中,含不同矿物组成样品比例分别为地开石(55.7%)、高岭石(12.7%)、珍珠陶石(7.5%)、伊利石(8.8%)、叶蜡石(15.4%)。与寿山石中的其它石种相比,田黄的矿物组成最为复杂。常见的田黄有地开石质、珍珠陶石质和伊利石质,可能存在高岭石质,没有发现有叶蜡石质田黄。含不同矿物组成的田黄样品比例分别为地开石67.5%、珍珠陶石20%、高岭石2.5%、伊利石10%。田黄中萝卜丝纹的矿物组成可能与基体的矿物组成相同,为地开石等,但也可能不同,为硫磷铝锶石或伊利石。一些研究者从矿物组成、微形貌特征和微量元素等方面对田黄与相似石种的区别进行了一些有益的探索,但目前还远远没有达到可以用来进行产地鉴别的程度。

Mineral components data of 228 Shoushan stone samples and 40 Tianhuang samples have been collected and analyzed. The proportions of different minerals in Shoushan stone samples are dickite(55.7%), kaolinite(12.7%), nacrite(7.5 %), illite(8.8%) and pyrophyllite(15.4%), respectively. Compared with other varieties of Shoushan stone, Tianhuang has the most complicated mineral components, which usually composed of dickite, nacrite, illite, possibly kaolinite, and no pyrophyllite. The proportions are respectively 67.5% dickite, 20% nacrite, 2.5% kaolinite and 10% illite. The mineral components of radish fiber like veins in Tianhuang could be dickite, which is the same as its main mineral, or svanbergite and illite. Although the differences between Tianhuang and its similar stone in mineral component, micro appearance and trace element have been studied, there is still a long way to go to distinguish Tianhuang from Tianhuang-like stone at present.