Identification of Jadeite Filled with Inorganic Materials Using UV Fluorescence, Infrared Spectroscopy and LIBS Techniques

YANG Chunmei; HUANG Ziyun; QIN Jingwen; LU Zhenping; LU Taijin; TANG Ziwei

doi:10.15898/j.cnki.11-2131/td.202109170123

2022 Vol. 41, No. 2

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Article navigation > Rock and Mineral Analysis > 2022 > 41(2): 281-290

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YANG Chunmei, HUANG Ziyun, QIN Jingwen, LU Zhenping, LU Taijin, TANG Ziwei. Identification of Jadeite Filled with Inorganic Materials Using UV Fluorescence, Infrared Spectroscopy and LIBS Techniques[J]. Rock and Mineral Analysis, 2022, 41(2): 281-290. doi: 10.15898/j.cnki.11-2131/td.202109170123

Citation:

YANG Chunmei, HUANG Ziyun, QIN Jingwen, LU Zhenping, LU Taijin, TANG Ziwei. Identification of Jadeite Filled with Inorganic Materials Using UV Fluorescence, Infrared Spectroscopy and LIBS Techniques[J]. Rock and Mineral Analysis, 2022, 41(2): 281-290. doi: 10.15898/j.cnki.11-2131/td.202109170123

Identification of Jadeite Filled with Inorganic Materials Using UV Fluorescence, Infrared Spectroscopy and LIBS Techniques

1.
Guangzhou Laboratory, National Gems & Jewelry Technology Administrative Center (National Gemstone Testing Center), Guangdong 511483, China
2.
Beijing Research Institute, National Gems & Jewelry Technology Administrative Center, Beijing 100013, China
3.
Guangzhou Panyu Polytechnic, Guangzhou 511483, China

More Information

Corresponding author: LU Taijin, taijinlu@hotmail.com

Received Date: 30 June 2021

Revised Date: 17 September 2021

Accepted Date: 11 November 2021

Publish Date: 28 March 2022

Abstract

Abstract

BACKGROUND
Through visiting the jadeite market, the existence of inorganic material-filled jadeite is known, but there is a lack of identification basis due to rare references.
OBJECTIVES
To understand the identification characteristics of inorganic material-filled jadeite.
METHODS
Two types of inorganic materials, water glass and silica sol, were used to fill low-grade jadeite in the simulation experiment. Conventional gemological tests, fluorescence image observation with DiamondView^TM, Fourier transform infrared (FTIR) spectroscopy, and laser-induced breakdown spectroscopy (LIBS) were used to test the inorganic filled jadeite samples.
RESULTS
The transparency, color, density and structure of jadeite were improved after filling. Under the DiamondView^TM, the jadeite particles in the sample showed green fluorescence, and the filling around the cracks and between the particles displayed blue fluorescence with non-uniform distribution. Mid-infrared reflectance spectrum analysis showed that the spectra of silica sol and water-glass were slightly different from each other. The absorption peaks of the samples filled with inorganic materials at 1162cm^-1, 1070cm^-1, 949cm^-1, 579cm^-1, 529cm^-1 and 470cm^-1 gradually weakened, and the peak shape gradually became smooth or disappeared. In addition, the differences between the jadeite and inorganic filled jadeite can be determined by the near-infrared spectral morphology and the shape of the absorption peak changed in the range of 7062cm^-1, 5204cm^-1 and 4537cm^-1. The laser-induced breakdown spectroscopy demonstrated that the content of the silicon in the jadeite filled with silicon sol or sodium and potassium water-glass was higher. The high potassium content was an important feature for the jadeite filled by sodium and potassium water-glass.
CONCLUSIONS
The samples effect of the simulation experiment needs to be improved, but the identification characteristics of the filled jadeite with inorganic materials are recognized, which has caused a further breakthrough in the enhancement and treatment of jadeite identification.
- jadeite /
- water-glass /
- silica sol /
- DiamondView^TM /
- infrared spectroscopy /
- laser-induced breakdown spectroscopy

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References

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