Gemmological and Mineralogical Characteristics of Changhua Yellow Stone

WANG Ziwei; CHEN Tao; ZHUANG Yue; ZHENG Jinyu; CAO Nan; CHEN Xin; YAN Xuejun; YAN Jun

doi:10.15964/j.cnki.027jgg.2022.02.010

Volume 24 Issue 2

Mar. 2022

Turn off MathJax

Article Contents

Abstract

References

Journal of Gems & Gemmology > 2022 > 24(2): 85-94. > DOI: 10.15964/j.cnki.027jgg.2022.02.010

WANG Ziwei, CHEN Tao, ZHUANG Yue, ZHENG Jinyu, CAO Nan, CHEN Xin, YAN Xuejun, YAN Jun. Gemmological and Mineralogical Characteristics of Changhua Yellow Stone[J]. Journal of Gems & Gemmology, 2022, 24(2): 85-94. DOI: 10.15964/j.cnki.027jgg.2022.02.010

Citation:

PDF (13207 KB)

Gemmological and Mineralogical Characteristics of Changhua Yellow Stone

1.
Gemmological Institute, China University of Geosciences, Wuhan 430074, China
2.
Zhejiang Fangyuan Testing Group Co., Ltd., Hangzhou 310013, China

More Information

Received Date: October 18, 2021

Graphical Abstract

Abstract

Abstract

Changhua yellow stone is produced in Changhua, Zhejiang Province. Its appearance is very similar to Tianhuang, and the gemmological and mineralogical study of Changhua yellow stone is of great significance to identify Tianhuang, especially its origin scientifically. In this paper the authors used microscope and polarizing microscope, X-ray powder diffractometer (XRD), infrared absorption spectrometer (FTIR) and scanning electron microscope (SEM) to study the microscopic characteristics, primary and secondary mineral components, and the fracture micro appearance characteristics of the rough stone crust and compared with the stone's internal XRD and FTIR characteristics. The results showed that the external mineral components of most Changhua yellow stones are mixed minerals of dickite and kaolinite in a low degree of order, and several samples are composed of pure dickite of lower degree order. Meanwhile, the internal mineral components of the stones are similar to the external, nevertheless, the content of kaolinite is higher, and there is little difference in the degree of order. The chemical composition of the main constituent minerals of the external and interior of Changhua yellow stone can be obtained by quantitative analysis of energy spectrum. There are many kinds of secondary minerals that are mostly distributed in the white pits on the crust of the Changhua yellow stone, including hematite, svanbergite, quartz, dolomite and gypsum etc. The distribution morphology was observed by EDS energy spectrum test.For the micro appearance characteristics, the diameter of kaolinite mineral particles constituting the crust of the stone is about 5 μm, and the gap between dickite particles is unclear. The particle boundary is smooth, and the aggregates are arranged in book shape, while the crystallization degree of the internal of the stone is good, which is stacked in pseudo-hexagonal sheet or imbricate shape.
- Changhua yellow stone,
- dickite,
- X-ray powder diffraction,
- infrared absorption spectrum,
- micromorphology

FullText(HTML)

References (14)

References

[1]	陈涛, 姚春茂, 亓利剑, 等. 田黄的矿物组成与微形貌特征初步研究[J]. 宝石和宝石学杂志(中英文), 2009, 11(3): 4, 9-13. https://www.cnki.com.cn/Article/CJFDTOTAL-BSHB200903000.htm Chen T, Yao C M, Qi L J, et al. Primary study on characteristics of mneral components and micro-morphology of Tianhuang[J]. Journal of Gems & Gemmology, 2009, 11(3): 4, 9-13. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BSHB200903000.htm
[2]	王长秋, 崔文元, 徐健人, 等. 昌化田黄的矿物学特征及相关问题探讨[J]. 岩石矿物学杂志, 2010, 29(S1): 48-55. https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW2010S1011.htm Wang C Q, Cui W Y, Xu J R, et al. A tentative discussion on mineralogy and related problems of Changhua Tianhuang stone[J]. Acta Petrologica et Mineralogica, 2010, 29(S1): 48-55. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW2010S1011.htm
[3]	钱雪雯. 昌化田黄石的宝石矿物学研究[D]. 北京: 中国地质大学, 2009. Qian X W. Study on gemology and mineralogy of Changhua Tianhuang stone[D]. Beijing: China University of Geosciences, 2009. (in Chinese)
[4]	王含, 周征宇, 钟倩, 等. 电子微探针-X射线衍射-扫描电镜研究老挝石岩石矿物学特征[J]. 岩矿测试, 2016, 35(1): 56-61. https://www.cnki.com.cn/Article/CJFDTOTAL-YKCS201601012.htm Wang H, Zhou Z Y, Zhong Q, et al. Study on petrological and mineralogical characteristics of Laos stone by EPMA-XRD-SEM[J]. Rock and Mineral Analysis, 2016, 35(1): 56-61. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YKCS201601012.htm
[5]	Moore D M. X-ray diffraction and the identification and analysis of clay minerals[C]. New York: Oxford University Press, 1989.
[6]	许乃岑, 沈加林, 骆宏玉. X射线衍射和红外光谱法分析高岭石结晶度[J]. 资源调查与环境, 2014, 35(2): 152-156. doi: 10.3969/j.issn.1671-4814.2014.02.011 Xu N C, Shen J L, Luo H Y. Analysis for crystallinity of kaolinites by X-ray diffractometer and infrared spectroscopy[J]. Resoureces Survey and Environment, 2014, 35(2): 152-156. (in Chinese) doi: 10.3969/j.issn.1671-4814.2014.02.011
[7]	汤德平, 郑宗坦. 寿山石的矿物组成与宝石学研究[J]. 宝石和宝石学杂志(中英文), 1999, 1(4): 28-36. https://www.cnki.com.cn/Article/CJFDTOTAL-BSHB199904009.htm Tang D P, Zheng Z T. Mineralogy and gemmology of Shoushan stone[J]. Journal of Gems & Gemmology, 1999, 1(4): 28-36. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BSHB199904009.htm
[8]	徐文静, 陈涛, 姚春茂. 老挝田黄石的宝石学与矿物学特征[J]. 岩石矿物学杂志, 2016, 35(2): 321-332. doi: 10.3969/j.issn.1000-6524.2016.02.012 Xu W J, Chen T, Yao C M. Gemological and mineralogical characteristics of Laos Tianhuang stone[J]. Acta Petrologica et Mineralogica, 2016, 35(2): 321-332. (in Chinese) doi: 10.3969/j.issn.1000-6524.2016.02.012
[9]	刘云贵, 陈涛. 田黄的红外与拉曼光谱研究[J]. 光谱学与光谱分析, 2012, 32(8): 2 143-2 146. https://www.cnki.com.cn/Article/CJFDTOTAL-GUAN201208034.htm Liu Y G, Chen T. Infrared and Raman spectra study on Tianhuang[J]. Spectroscopy and Spectral Analysis, 2012, 32(8): 2 143-2 146. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GUAN201208034.htm
[10]	Balan E, Lazzeri M, Saitta A M, et al. First-principles study of OH-stretching models in kaolinite, dickite, and nacrite[J]. American Mineralogist, 2005(90): 50-60.
[11]	Frost R L. Combination bands in the infrared spectroscopy of kaolins-A drift spectroscopic study[J]. Clays & Clay Minerals, 1998, 46(4): 466-477.
[12]	邓雨晴, 陈涛. 寿山水坑石的透明度影响因素[J]. 光谱学与光谱分析, 2018, 38(5): 1 400-1 405. https://www.cnki.com.cn/Article/CJFDTOTAL-GUAN201805016.htm Deng Y Q, Chen T. Influence factors of transparency on Shuikeng stone from Shoushan[J]. Spectroscopy and Spectral Analysis, 2018, 38(5): 1 400-1 405. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-GUAN201805016.htm
[13]	邓雨晴, 陈涛. 寿山水坑石的矿物成分、内含物及微量元素特征[J]. 岩石矿物学杂志, 2018, 37(2): 296-308. https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201802009.htm Deng Y Q, Chen T. Mineral composition, inclusions and trace element characteristics of Shuikeng Stone from Shoushan, Fujian Province[J]. Acta Petrologica et Mineralogica, 2018, 37(2): 296-308. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201802009.htm
[14]	Franchini M, Impiccini A, Lentz D, et al. Porphyry to epithermal transition in the Agua Rica polymetallic deposit, Catamarca, Agrgentina: An integrated petrologic analysis of ore and alteration parageneses[J]. Ore Geology Reviews, 2011, 41(1): 49-74. doi: 10.1016/j.oregeorev.2011.06.010