Study on the Gemological Characteristics of an Illite-imitated Dushan Jade

WANG Xiaoli; GUO Jungang; MA Chi; WANG Shoujing

doi:10.13779/j.cnki.issn1001-0076.2018.06.014

2018 Vol. 38, No. 6

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Article navigation > Conservation and Utilization of Mineral Resources > 2018 > (6): 70-72, 76

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WANG Xiaoli, GUO Jungang, MA Chi, WANG Shoujing. Study on the Gemological Characteristics of an Illite-imitated Dushan Jade[J]. Conservation and Utilization of Mineral Resources, 2018, (6): 70-72, 76. doi: 10.13779/j.cnki.issn1001-0076.2018.06.014

Citation:

WANG Xiaoli, GUO Jungang, MA Chi, WANG Shoujing. Study on the Gemological Characteristics of an Illite-imitated Dushan Jade[J]. Conservation and Utilization of Mineral Resources, 2018, (6): 70-72, 76. doi: 10.13779/j.cnki.issn1001-0076.2018.06.014

Study on the Gemological Characteristics of an Illite-imitated Dushan Jade

1.
Zhengzhou Institute of Multi-purpose Utilization of Mineral Resources, CAGS, Zhengzhou 450006, China
2.
China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China

Received Date: 27 February 2018

Publish Date: 25 December 2018

Abstract

Abstract

In order to determine the authenticity of a Dushan jade sample, it was analyzed by thin section identification, XRD powder diffraction and electron probe analysis. The test results showed that the sample was composed of illite and a small amount of sericite without plagioclase, mica and any other mineral phases that constitute Dushan Jade, implying that it was a counterfeit product. In addition, combined with the microscopic identification characteristics and electron probe analysis results, the author preliminarily concluded that the emerald green color present in the sample was due to the coloration of iron element. This counterfeit product is similar in appearance to Dushan Jade, and the conventional gemological parameters are also similar. But the hardness of the former is lower than that of Dushan Jade. Since the hardness test is a lossy test, it is recommended that the testing organization apply the infrared spectrometer for daily inspection.
- imitated Dushan Jade /
- illite /
- X-ray diffraction /
- infrared spectrum /
- electronic probe

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References

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