田黄“红格”的宝石学特征研究  

Gemmological Characteristic of Fracture in Tianhuang

作　　者：刘云贵 郑金宇 姚春茂 陈涛[3] LIU Yungui;ZHENG Jinyu;YAO Chunmao;CHEN Tao(College of Gems and Materials,Hebei GEO University,Shijiazhuang 050031,China;School of Earth Sciences,China University of Geosciences,Wuhan 430074,China;Gemmological Institute,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]河北地质大学宝石与材料学院,河北石家庄050031 [2]中国地质大学地球科学学院,湖北武汉430074 [3]中国地质大学珠宝学院,湖北武汉430074

出　　处：《宝石和宝石学杂志（中英文）》2022年第2期31-36,共6页Journal of Gems & Gemmology

基　　金：国家自然科学基金(42103034)。

摘　　要：田黄是中国四大名石之一寿山石中最珍贵的品种,具有深厚的文化底蕴,备受珠宝市场和收藏届关注。红格、石皮和萝卜纹是其典型的鉴定特征,其中红格为田黄中肉眼可见的红褐色裂隙,系统研究田黄红格的宝石学特征对于科学鉴定田黄有重要的理论意义。采用显微观察、扫描电子显微镜、能谱仪和激光拉曼光谱仪对田黄样品中红格的显微形貌和成分特征进行测试分析。研究结果表明,田黄因受外力作用生成裂隙,次生酸性氧化环境中的Fe元素进入裂隙并形成以针铁矿为主要成分的含铁矿物,导致其裂隙呈红褐色,进而形成田黄特征的红格。显微拉曼光谱中252 cm^(-1)和384 cm^(-1)处的拉曼位移峰对于鉴定田黄中天然成因的红格具有重要指示意义。Tianhuang is the most precious variety of Shoushan stone, one of the four famous stones in China. It has profound cultural connotation and attracts much attention to jewelry and collectibles markets. The fracture, rough stone crust and radish fiber like veins are the typical identification characteristics of Tianhuang. The fracture is the visible reddish-brown healed fissure in Tianhuang and its systematic study has important theoretical value for the scientific identification of Tianhuang. The microscopic observation, scanning electron microscope, energy dispersive spectrometer and Raman spectrometer were used to study the micromorphological and compositional characteristics of the fracture in Tianhuang. The results suggested that the fracture in Tianhuang is due to external forces and the Fe element seeps into the fracture caused by primary deposit of Tianhuang and forms goethite in the secondary acidic oxidizing environment, which causes the reddish-brown colour of the fracture. The Raman peaks at 252 cm^(-1) and 384 cm^(-1) have great significance for the identification of natural fracture in Tianhuang.

关 键 词：田黄 寿山石 红格 次生环境 针铁矿 

分 类 号：TS93[轻工技术与工程]