Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China
In recent years, “Jin Gao Yu” that has been traded as a kind of jade has appeared in areas of the Luonan and Shangnan counties, Shangluo City, Shaanxi Province, attracting the attention of scholars and consumers for its delicate texture and warm color. In this study, infrared spectroscopy, Raman spe...
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MDPI AG
2023-09-01
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| Series: | Crystals |
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| author | Liangyu Liu Niu Li Qingfeng Guo Shuxin Zhao Yinghua Rao Yang Liu Libing Liao |
| author_facet | Liangyu Liu Niu Li Qingfeng Guo Shuxin Zhao Yinghua Rao Yang Liu Libing Liao |
| author_sort | Liangyu Liu |
| collection | DOAJ |
| description | In recent years, “Jin Gao Yu” that has been traded as a kind of jade has appeared in areas of the Luonan and Shangnan counties, Shangluo City, Shaanxi Province, attracting the attention of scholars and consumers for its delicate texture and warm color. In this study, infrared spectroscopy, Raman spectroscopy, X-ray diffraction analysis, and electron microprobe analysis were used to conduct a systematic gemmological test and an analysis of “Jin Gao Yu”. The results show that “Jin Gao Yu” is a compact mineral aggregate dominated by dolomite, which contains quartz mineral inclusions. The color of “Jin Gao Yu” is grayish-white to earthy-yellow, the refractive index is about 1.54, and the relative density is about 2.86. Its crystal structure is basically the same as that of dolomite, both of which are trigonal systems with granular crystalloblastic textures. It has good crystallinity. The recrystallization phenomenon can be seen under a polarizing microscope. This study determined the species of “Jin Gao Yu”, improved its gemological basic data, provided a theoretical basis for the identification of “Jin Gao Yu” in the future, and, also, provided a new direction for the use of dolomite. |
| first_indexed | 2024-03-10T22:53:02Z |
| format | Article |
| id | doaj.art-30711653d85a40288daa0df36e50cbbb |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T22:53:02Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-30711653d85a40288daa0df36e50cbbb2023-11-19T10:10:07ZengMDPI AGCrystals2073-43522023-09-01139139910.3390/cryst13091399Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, ChinaLiangyu Liu0Niu Li1Qingfeng Guo2Shuxin Zhao3Yinghua Rao4Yang Liu5Libing Liao6School of Gemology, China University of Geosciences, Beijing 100083, ChinaSchool of Gemology, China University of Geosciences, Beijing 100083, ChinaSchool of Gemology, China University of Geosciences, Beijing 100083, ChinaSchool of Gemology, China University of Geosciences, Beijing 100083, ChinaSchool of Gemology, China University of Geosciences, Beijing 100083, ChinaSchool of Gemology, China University of Geosciences, Beijing 100083, ChinaBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, ChinaIn recent years, “Jin Gao Yu” that has been traded as a kind of jade has appeared in areas of the Luonan and Shangnan counties, Shangluo City, Shaanxi Province, attracting the attention of scholars and consumers for its delicate texture and warm color. In this study, infrared spectroscopy, Raman spectroscopy, X-ray diffraction analysis, and electron microprobe analysis were used to conduct a systematic gemmological test and an analysis of “Jin Gao Yu”. The results show that “Jin Gao Yu” is a compact mineral aggregate dominated by dolomite, which contains quartz mineral inclusions. The color of “Jin Gao Yu” is grayish-white to earthy-yellow, the refractive index is about 1.54, and the relative density is about 2.86. Its crystal structure is basically the same as that of dolomite, both of which are trigonal systems with granular crystalloblastic textures. It has good crystallinity. The recrystallization phenomenon can be seen under a polarizing microscope. This study determined the species of “Jin Gao Yu”, improved its gemological basic data, provided a theoretical basis for the identification of “Jin Gao Yu” in the future, and, also, provided a new direction for the use of dolomite.https://www.mdpi.com/2073-4352/13/9/1399Jin Gao YudolomiteShangluoQinlingShaanxi provinceChina |
| spellingShingle | Liangyu Liu Niu Li Qingfeng Guo Shuxin Zhao Yinghua Rao Yang Liu Libing Liao Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China Crystals Jin Gao Yu dolomite Shangluo Qinling Shaanxi province China |
| title | Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China |
| title_full | Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China |
| title_fullStr | Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China |
| title_full_unstemmed | Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China |
| title_short | Gemmological Characteristics of the “Jin Gao Yu” from Shangluo City, Qinling Mountains, Shaanxi Province, China |
| title_sort | gemmological characteristics of the jin gao yu from shangluo city qinling mountains shaanxi province china |
| topic | Jin Gao Yu dolomite Shangluo Qinling Shaanxi province China |
| url | https://www.mdpi.com/2073-4352/13/9/1399 |
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