|
|
|
|
|
|
| Study on the Gemmological Characteristics of Filled Morganite |
| WU Yan-han, CHEN Quan-li*, ZHAO An-di, LI Xuan, BAO Pei-jin |
Gemmological Institute，China University of Geosciences（Wuhan），Wuhan 430074，China
|
|
|
|
|
Abstract Using conventional gemological methods, energy dispersive X-ray fluorescence spectrometer，laser Raman spectrometer, Fourier transform infrared spectrometer and fluorescence spectrometer to study the gemological characteristics of filled morganite and to explore effective non-destructive identification method of filling treated morganites. The results show that the refractive index of filled morganites (1.57) is slightly less than that of natural morganites. The SG values of the filled morganites range from 2.71 to 2.76. The natural morganites do not emit light under neither long-wave or short-wave UV radiation, but filled morganites show weak to medium white fluorescence under UV radiation. And the fluorescence of some samples is distributed along the fractures. After zooming in, fine reticular open cracks can be seen on the surface of partially filled morganites, and traces of glue filling can be seen in the cracks. Energy dispersive X-ray fluorescence spectrometer (EDXRF) shows Si, Al, Rb, Cs and other elements in filled morganites and natural morganites. The difference of Raman spectra between natural morganites and filled morganites is not obvious, and the effect of laser Raman spectrometer on distinguishing natural morganite and filled morganite is not obvious. The FTIR spectra of natural morganites are mainly in 1 300~400 cm-1, which is attributed to the structural vibration of Si—O—Si ring, Be—O and Al—O; in the 4 000~2 000 cm-1 functional group region, there is 2 359 cm-1 absorption peaks produced by CO2, 3 110 and 3 168 cm-1 absorption peaks produced by NaH. In addition to the vibration absorption of morganite itself, the absorptions of (—CH3—), (—CH2—) are common at 2 870, 2 930 and 2 965 cm-1, filled morganites have the absorption caused by benzene ring exists at 3 035 and 3 057 cm-1. Three-dimensional fluorescence spectrometer analysis shows that the fluorescence of natural morganites is very weak, without a characteristic fluorescence center, and the relative intensity is less than 500; the fluorescence centers of filled morganites are mainly single fluorescence center about 410 nm and double fluorescence center of 440 and 465 nm, with relative intensities exceeding 2 000. The relative intensity of the fluorescence center of filled morganite is significantly higher than that of natural morganite, which is attributed to the aromatic compounds in organic gum added during the filling process. Through Fourier transform infrared spectrometer and fluorescence spectrometer test, the spectrum analysis can be used as an effective and rapid non-destructive detection method to distinguish natural morganites and filling treated morganites.
|
|
Received: 2021-01-07
Accepted: 2021-02-24
|
|
|
|
Corresponding Authors:
CHEN Quan-li
E-mail: chenquanli_0302@163.com
|
|
[1] Hänni H A, Krzemnicki M S. The Journal of Gemmology, 2003, 28(7): 417.
[2] YIN Zuo-wei, LI Xiao-lu, BAO De-qing, et al(尹作为，李笑路，包德清, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2014，34(8): 2175.
[3] ZHANG Bei-li(张蓓莉). Systematic Gemology(系统宝石学). Beijing：Geological Publishing House(北京：地质出版社)，2006. 288.
[4] Li Jianjun, Sun Yuan, Hao Wangjiao, et al. Gems & Gemology, 2009，45(3): 197.
[5] ZHOU Tian-yi, CHEN Yan-jing, ZHANG Hui(周天怡，陈衍景，张 辉). Acta Petrologica et Mineralogica(岩石矿物学杂志)，2014，33(S2): 77.
[6] Nassau K，Wood D L. American Mineralogist, 1968, 53: 801.
[7] QI Li-jian, YE Song, XIANG Chang-jin, et al(亓利剑，叶 松，向长金，等). Geological Science and Technology Information(地质科技情报)，2001，20(3): 59.
[8] WANG Duo，CHEN Zheng, DENG Chang-jie, et al(王 铎，陈 征，邓常劼，等) . Journal of Gems and Gemmology（宝石和宝石学杂志），2012，14(4): 16.
[9] WU Xing-liang, ZHU Wan-seng, MA Lin(吴性良，朱万森，马 林). Beijing：Chemical Industry Press(北京: 化学工业出版社), 2004. 354.
|
| [1] |
LI Shu-jie1, LIU Jie1, DENG Zi-ang1, OU Quan-hong1, SHI You-ming2, LIU Gang1*. Study of Germinated Rice Seeds by FTIR Spectroscopy Combined With Curve Fitting[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1832-1840. |
| [2] |
ZHANG Yan-ru1, 2, SHAO Peng-shuai1*. Study on the Effects of Planting Years of Vegetable Greenhouse on the
Cucumber Qualties Using Mid-IR Spectroscopoy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1816-1821. |
| [3] |
SHI Wen-qiang1, XU Xiu-ying1*, ZHANG Wei1, ZHANG Ping2, SUN Hai-tian1, 3, HU Jun1. Prediction Model of Soil Moisture Content in Northern Cold Region Based on Near-Infrared Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1704-1710. |
| [4] |
WANG Xue-pei1, 2, ZHANG Lu-wei1, 2, BAI Xue-bing3, MO Xian-bin1, ZHANG Xiao-shuan1, 2*. Infrared Spectral Characterization of Ultraviolet Ozone Treatment on Substrate Surface for Flexible Electronics[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1867-1873. |
| [5] |
WANG Yue1, 3, 4, CHEN Nan1, 2, 3, 4, WANG Bo-yu1, 5, LIU Tao1, 3, 4*, XIA Yang1, 2, 3, 4*. Fourier Transform Near-Infrared Spectral System Based on Laser-Driven Plasma Light Source[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1666-1673. |
| [6] |
FENG Rui-jie1, CHEN Zheng-guang1, 2*, YI Shu-juan3. Identification of Corn Varieties Based on Bayesian Optimization SVM[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1698-1703. |
| [7] |
YU Zhi-rong, HONG Ming-jian*. Near-Infrared Spectral Quantitative Analysis Network Based on Grouped Fully Connection[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1735-1740. |
| [8] |
XIE Yu-yu1, 2, 3, HOU Xue-ling1, CHEN Zhi-hui2, AISA Haji Akber1, 3*. Density Functional Theory Studies on Structure and Spectra of Salidroside Molecule[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1786-1791. |
| [9] |
MENG Fan-jia1, LUO Shi1, WU Yue-feng1, SUN Hong1, LIU Fei2, LI Min-zan1*, HUANG Wei3, LI Mu3. Characteristic Extraction Method and Discriminant Model of Ear Rot of Maize Seed Base on NIR Spectra[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1716-1720. |
| [10] |
PENG Yan-fang1, WANG Jun1, WU Zhi-sheng2*, LIU Xiao-na3, QIAO Yan-jiang2*. NIR Band Assignment of Tanshinone ⅡA and Cryptotanshinone by
2D-COS Technology and Model Application Tanshinone Extract[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1781-1785. |
| [11] |
TIAN Xue1, CHE Qian1, YAN Wei-min1, OU Quan-hong1, SHI You-ming2, LIU Gang1*. Discrimination of Millet Varieties and Producing Areas Based on Infrared Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1841-1847. |
| [12] |
HU Bin1, 2, FU Hao1, WANG Wen-bin1, ZHANG Bing1, 2, TANG Fan3*, MA Shan-wei1, 2, LU Qiang1, 2*. Research on Deep Sorting Approach Based on Infrared Spectroscopy for High-Value Utilization of Municipal Solid Waste[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(05): 1353-1360. |
| [13] |
YAN Ling-tong, LI Li, SUN He-yang, XU Qing, FENG Song-lin*. Spectrometric Investigation of Structure Hydroxyl in Traditional Ceramics[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(05): 1361-1365. |
| [14] |
WANG Li-qi1, YAO Jing1, WANG Rui-ying1, CHEN Ying-shu1, LUO Shu-nian2, WANG Wei-ning2, ZHANG Yan-rong1*. Research on Detection of Soybean Meal Quality by NIR Based on
PLS-GRNN[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(05): 1433-1438. |
| [15] |
WANG Yan-ru, TANG Hai-jun*, ZHANG Yao. Study on Infrared Spectral Detection of Fuel Contamination in Mobil Jet Oil II Lubricating Oil[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(05): 1541-1546. |
|
|
|
|
