Study on Spectral Characteristics and Differences of Natural and Pink Dushan Jade
LU Ming-mei1, ZHOU Zheng-yu1, 2, 3*, QI Li-jian1, 2, 3, LIU Zi-qi1, CHEN Yi-fang1, ZHENG Jun-hao1
1. School of Ocean and Earth Science, Tongji University, Shanghai 200092, China
2. Shanghai Engineering and Technology Research Center of Gem and Material Technology, Shanghai 200092, China
3. Laboratory of Gem and Technological Materials, Tongji University, Shanghai 200092, China
Abstract：To reveal the difference in material composition, color origin, and scientific identification characteristics of natural pink Dushan jade and dyed pink Dushan jade from Nanyang, Henan Province, conventional gemological characteristics, infrared spectrum, Raman spectrum, UV-visible absorption spectrum, electron paramagnetic resonance spectrum, and photoluminescence spectrum were tested. The results show that the refractive index and relative density of Dushan jade are concentrated, which is close to that of plagioclase. The natural red-only jade shows two refractive index values of plagioclase and zoisite in different positions. Infrared spectra combined with Raman spectra show that the pink part of the natural red monozoite is consistent with the characteristic spectrum peak of zoisite, indicating that the zoisite has a high degree of fossilization. In contrast, the white and green parts are dominated by basic plagioclase. The chromaticity of Dushan jade has a low degree of zoisite mineralization, so the conventional gemological parameters are close to that of plagioclase, which often requires dyeing treatment and shows abnormal yellow-white long-wave ultraviolet fluorescence. The UV spectrum of the natural samples showed a wide and slow absorption band near 522 nm, which revealed that Mn was the main cause of the natural red-jade pink color. The electron paramagnetic spectrum further reveals the six-fold hyperfine structure of Mn2+, which is the6A1→4T1(4G) spin-forbidden transition of Mn2+ in the octahedral field. The staining of Dushan jade shows the dye absorption near 549 nm, corresponding to the intense luminescence center at 578~589 nm in the photoluminescence spectrum. UV fluorescent lamp, UV-VIS spectrum, and photoluminescence spectrum can be effective nondestructive testing methods for natural red and colored pink Dushan jade.
芦明媚，周征宇，亓利剑，刘子琪，陈仪方，郑浚豪. 天然红独玉与染色红独玉光谱学特征及其差异性研究[J]. 光谱学与光谱分析, 2024, 44(11): 3157-3164.
LU Ming-mei, ZHOU Zheng-yu, QI Li-jian, LIU Zi-qi, CHEN Yi-fang, ZHENG Jun-hao. Study on Spectral Characteristics and Differences of Natural and Pink Dushan Jade. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(11): 3157-3164.
[1] WANG Jian-zhong(王建中). Cultural Relics of Central China(中原文物), 2002，(2): 51.
[2] LU Li, BIAN Qiu-juan(鲁 力，边秋娟). Journal of Gems and Gemmology(宝石和宝石学杂志), 2004，(2): 4.
[3] HE Xue-mei, XUE Yuan, JIANG Wen-yi, et al(何雪梅, 薛 源, 蒋文一, 等), Acta Petrologica et Mineralogica(岩石矿物学杂志), 2014, 33(S1): 69.
[4] Vigier M, Fritsch E. The Journal of Gemmology, 2020，37: 192.
[5] Langer K, Raith M. American Mineralogist, 1974，59(11-12): 1249.
[6] PENG Wen-shi, LIU Gao-kui(彭文世，刘高魁). Infrared Spectra Atlas of Minerals(矿物红外光谱图集). Beijing: Science Press(北京：科学出版社), 1982. 426.
[7] WEN Luo(闻 骆). The Infrared Spectroscopy of Minerals(矿物红外光谱学). Chongqing: Chongqing University Press(重庆：重庆大学出版社)，1989. 104.
[8] PAN Feng, YU Xue-hui, MO Xuan-xue，et al(潘 峰，喻学惠，莫宣学，等). Journal of the Chinese Ceramic Society(硅酸盐学报), 2009, 37(12): 2043.
[9] Borenstein G, O'Neal S. Gems and Gemology, 2023, 58: 519.
[10] LUO Ze-min, SHEN Xi-tian, YANG Ming-xing(罗泽敏, 沈锡田, 杨明星). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2017，37(3): 822.
[11] FAN Jian-liang, FENG Xi-qi, GUO Shou-guo，et al(范建良, 冯锡淇，郭守国, 等). Journal of the Chinese Ceramic Society(硅酸盐学报), 2009，37(4): 523.
[12] HAN Wen, LIU Yang, ZHANG Jun, et al(韩 文, 刘 洋, 张 钧, 等). Acta Mineralogica Sinica(矿物学报), 2020, 40(5): 549.
[13] LIU Yi-cen, ZHOU Zheng-yu, YANG Xiao-yi，et al(刘奕岑, 周征宇, 杨萧亦, 等). Acta Petrologica et Mineralogica(岩石矿物学杂志), 2021, 40(6): 1189.
[14] LIN Chuan-yi, ZHU He-bao, MA Zhong-wei(林传易, 朱和宝, 马仲伟). Acta Mineralogica Sinica(矿物学报), 1981, (1): 40.
[15] Gaft M, Reisfeld R, Panczer G. Modern Luminescence Spectroscopy of Minerals and Materials. Berlin, German: Springer, 2015. 345.
