福建明溪“类达碧兹”蓝宝石的荧光光谱学特征

doi:10.3964/j.issn.1000-0593(2025)04-1103-06

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Abstract Mingxi in Fujian Province is one of China's most important sapphire origins, and the gemological research on sapphires from this area is still scarce. In addition, there is currently limited research on the fluorescence characteristic of blue sapphires. This study investigated a batch of sapphires with the “trapiche” phenomenon from Mingxi, Fujian, by conventional gemological instruments, laser denudation plasma mass spectrometer, Raman spectroscopy, and three-dimensional fluorescence spectrometer. The chemical composition and Raman spectroscopy results show that the core, arm, and main body of the “trapiche” gem are composed of corundum and should belong to the “trapiche-like” series.The concentrations of Fe, Ti, and other chromogenic elements in the “trapiche-like” sapphire exhibit no significant variation across different regions, suggesting that the “trapiche-like” phenomenon is not correlated with the distribution of chromogenic elements. The analysis of trace elements and their ratios indicates that the samples exhibit geochemical characteristics consistent with basaltic sapphires, however, the chromium content is mostly higher than >40 ppmw in Mingxi, Fujian basaltic sapphires exceeding that of other basaltic sapphires. Both Raman spectroscopy and fluorescence spectrometer detected several Cr fluorescence peaks of the samples at or near 694 nm. In the three-dimensional fluorescence spectroscopy test, the optimal excitation wavelengths for Cr fluorescence peaks are 410 and 560 nm. The fluorescence intensity of the arm is stronger than that of the core and the main body，which may be caused by the lower concentration of Fe element in the arm. The appearance of Cr fluorescence in the three-dimensional fluorescence spectrum may be related to the higher concentration of Cr element compared with basaltic sapphires originating from other places. Combined with previous studies, it can be differentiated from basaltic sapphires from Laos by observing whether it has the fluorescence peaks of Cr, but this cannot be used to distinguish basaltic and metamorphic sapphires. This study indicates that Mingxi, Fujian has “trapiche-like” sapphires, and the fluorescence spectroscopy results in this study not only enrich the spectroscopy data of basaltic sapphires from Mingxi，Fujian but also offer a fresh perspective for origin identification studies.

Key words：“Trapiche-like” Sapphire; Mingxi Fujian; Spectroscopic characteristic;Three-dimensional fluorescence spectroscopy

Received: 2024-04-21 Accepted: 2024-07-26

ZTFLH:

P575.4

Corresponding Authors: LAI Xiao-jing E-mail: laixiaojing@cug.edu.cn

Cite this article:

HOU Chao-xin,QU Xin-yue,XIA Su-qin, et al. Fluorescent Spectroscopic Features of “Trapiche-Like” Sapphire From Mingxi，Fujian Province[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2025, 45(04): 1103-1108.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2025)04-1103-06 OR https://www.gpxygpfx.com/EN/Y2025/V45/I04/1103

[1] Isabella Pignatelli，Gaston Giuliani，Christophe Morlot, et al. The Journal of Gemmology，2019，36(8)：726.
[2] HUANG Hui-zhen，LUO Jie，XU Ya-lan（黄惠臻，罗洁，徐亚兰）. Laser & Optoelectronics Progress（激光与光电子学进展），2021, 58（9）：0930001.
[3] Pignatelli I，Giuliani G，Ohnenstetter D，et al. Gems & Gemology，2015，51（3）：222.
[4] Sunagawa I，Bernhardt H J，Schmetzer K. Journal of Crystal Growth，1999，206（4）：322.
[5] Smith C P，Kammerling R C，Keller A S，et al. Gems & Gemology，1995，31（3）：168.
[6] ZHANG Jing-yang，YUAN Xin-qiang（张敬阳，袁心强）. Acta Petrologica et Mineralogica（岩石矿物学杂志），2001，（2）：162.
[7] TANG De-ping，JIANG Ai-geng，DUAN Jian-ping，et al（汤德平，江爱耕，段建平，等）. Acta Mineralogica Sinica（矿物学报），1998，（4）：533.
[8] Liu Yongsheng，Hu Zhaochu，Gao Shan，et al. Chemical Geology，2008，257：34.
[9] XIA Su-qin，JIANG Hao，PEI Jing-cheng, et al（夏苏琴，姜浩，裴景成，等）. Journal of Gems & Gemmology（宝石和宝石学杂志），2023，25（5）：73.
[10] Abduriyim A，Kitawaki H. The Journal of Gemmology，2006，30（1）：23.
[11] Peucat J J，Ruffault P，Fritsch E，et al. Lithos，2007，98（1-4）：261.
[12] Uher P，Giuliani G，Szakall S，et al. Geologica Carpathica，2012，63（1）：71.
[13] FAN Jian-liang，GUO Shou-guo，LIU Xue-liang，et al（范建良，郭守国，刘学良，等）. Applied Laser（应用激光），2008，（2）：150.
[14] Barone G，Bersani D，Crupi V，et al. Journal of Raman Spectroscopy，2014，45（11-12）：1309.
[15] Venkateswaram C S. Proceedings of the Indian Academy of Sciences-Section A，1935, 2（5）：459.
[16] ZHANG Yu-yang，CHEN Mei-hua，YE Shuang，et al（张雨阳，陈美华，叶爽，等）. Spectroscopy and Spectral Analysis（光谱学与光谱分析），2022, 42（5）：1508.
[17] LIANG Bi-xin，CHEN Mei-hua（梁璧馨，陈美华）. Journal of Gems & Gemmology（宝石和宝石学杂志），2022, 24（1）：28.