陕西汉中符山石玉的宝石矿物学特征

陈忻; 沙鑫; 刘欢; 李新; 阮青锋

陕西汉中符山石玉的宝石矿物学特征

陈忻^1,,
沙鑫^{1, 2},
刘欢¹,
李新¹,
阮青锋^{1, 2, ,}

1.
桂林理工大学地球科学学院，广西桂林 541006
2.
广西隐伏金属矿产勘查重点实验室，广西桂林 541006

基金项目:

国家自然科学基金项目 41962004

详细信息

作者简介:
陈忻(1999-)，女，硕士研究生，主要从事宝石矿物学方面的研究。E-mail：497006387@qq.com

通讯作者:
阮青锋(1971-)，男，博士，教授，主要从事矿物学、宝石学方面的教学与科研工作。E-mail：rqfgut@163.com

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出版历程
- 收稿日期: 2024-07-14
- 刊出日期: 2024-10-30

Gemmological and Mineralogical Characteristics of Vesuvianite Jade from Hanzhong, Shaanxi Province

CHEN Xin^1,,
SHA Xin^{1, 2},
LIU Huan¹,
LI Xin¹,
RUAN Qingfeng^{1, 2, ,}

1.
College of Earth Sciences, Guilin University of Technology, Guilin 541006, China
2.
Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541006, China

摘要

摘要:
近年来，人们对发现于陕西汉中的符山石玉进行了初步的宝玉石学特征研究，但对玉石的矿物学特征及颜色成因仍缺乏系统性的研究。本研究借助常规宝石学仪器、偏光显微镜、电子探针、红外光谱仪、紫外-可见光谱仪等仪器设备，系统分析了陕西汉中符山石玉的宝石学、矿物学及谱学特征，初步探讨了样品的颜色成因。本文符山石玉样品以绿色为主，颜色分布不均，局部可见浅绿色、黄绿色、翠绿色等不同色调；致密块状，以显微变晶结构为主，局部可见不等粒粒状变晶结构、柱状结构及纤维状结构；主要组成矿物为符山石，次要矿物包括石榴石、透辉石、绿泥石、绿帘石及方解石等。符山石的主要化学成分: w(SiO₂)=37.10%~38.29%、w(Al₂O₃)=17.49%~19.67%, w(CaO)=38.18%~39.28%，含有少量的FeO和MgO等。样品的红外光谱与符山石标准的红外光谱基本一致。样品的颜色主要取决于符山石晶体的颜色及其分布，不同颜色样品的化学成分和紫外-可见光谱结果表明，符山石晶体中Fe²⁺的电子跃迁和Fe²⁺-Fe³⁺之间的电荷转移导致符山石玉呈绿色，黄色主要取决于符山石晶体中O^2-→Fe²⁺之间的电荷转移，Fe³⁺的电子跃迁起辅助作用。
- 符山石玉 /
- 宝石学特征 /
- 矿物学特征 /
- 谱学特征 /
- 陕西汉中
Abstract:
In recent years, the vesuvianite jade with good quality has been discovered in Hanzhong, Shaanxi Province, and its preliminary researches have been carried out on gemmological characteristics. However, there is still a lack of systematic research on the mineralogical characteristics of the vesuvianite jade and its relationship with the quality. In this study, the gemmological, mineralogical and spectral characteristics of vesuvianite jade from Hanzhong, Shaanxi Province, were systematically analyzed using conventional gemmological tests, polarizing microscope, electron probe, infrared spectrometer, ultraviolet-visible spectrometer, etc. The colour genesis of vesuvianite jade was initially explored. The vesuvianite jade samples are mainly green, with uneven colour distribution, and different shades of light green, yellowish green and emerald green can be seen locally; they are dense and massive, with micro-metamorphic structures, and unequal grain-like metamorphic, columnar and fibrous structures can be seen locally; the main mineral is vesuvianite and the secondary minerals include garnet, diopside, chlorite, epidote and calcite. The main chemical compositions of vesuvianite jade is: w (SiO₂ ) = 37.10 %-38.29 %, w (Al₂O₃) = 17.49 %-19.67 %, w (CaO) = 38.18 %-39.28 %, with a small amount of FeO and MgO. The infrared spectrum of sample is basically consistent with that of vesuvianite. The colour of sample mainly depends on the colour of the vesuvianite jade crystals and distribution. The chemical compositions and UV-Visible spectral characteristics of different colours samples indicate that the electron transition of Fe²⁺ and the charge transfer between Fe²⁺-Fe³⁺ in the vesuvianite crystals lead to the green colour. The yellow color is mainly caused by the charge transfer between O^2- → Fe²⁺ in the vesuvianite crystals, and the electron transition of Fe³⁺ plays a supporting role.
- vesuvianite jade /
- gemmological characteristic /
- mineralogical characteristic /
- spectral characteristic /
- Hanzhong, Shaanxi Province

HTML全文

图 1 陕西汉中符山石玉的照片(从a到d依次为样品V1、V2、V3、V4)

Figure 1. Photographs of vesuvianite jades from Hanzhong, Shaanxi Province(samples V1, V2, V3 and V4 from Fig. 1a to Fig. 1d)

下载: 全尺寸图片幻灯片

图 2 陕西汉中符山石玉的紫外-可见光光谱

Figure 2. UV-Vis spectra of vesuvianite jades from Hanzhong, Shaanxi Province

下载: 全尺寸图片幻灯片

图 1 陕西汉中符山石玉的照片(从a到d依次为样品V1、V2、V3、V4)

Figure 1. Photographs of vesuvianite jades from Hanzhong, Shaanxi Province(samples V1, V2, V3 and V4 from Fig. 1a to Fig. 1d)

下载: 全尺寸图片幻灯片

图 2 陕西汉中符山石玉的紫外-可见光光谱

Figure 2. UV-Vis spectra of vesuvianite jades from Hanzhong, Shaanxi Province

下载: 全尺寸图片幻灯片

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