Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl
In this study, seventeen faceted gem-quality chrysoberyls exhibiting an attractive canary yellow color were investigated using a variety of gemological, spectral, and chemical methods. Microscopic observation revealed the presence of distinct growth lines and inclusions, including CO<sub>2<...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/13/11/1580 |
| _version_ | 1797459686969049088 |
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| author | Yujie Gao Xu Li Yansheng Cheng Tiantian Huang Kongliang Li Bo Xu Ruobin Tang |
| author_facet | Yujie Gao Xu Li Yansheng Cheng Tiantian Huang Kongliang Li Bo Xu Ruobin Tang |
| author_sort | Yujie Gao |
| collection | DOAJ |
| description | In this study, seventeen faceted gem-quality chrysoberyls exhibiting an attractive canary yellow color were investigated using a variety of gemological, spectral, and chemical methods. Microscopic observation revealed the presence of distinct growth lines and inclusions, including CO<sub>2</sub> fluids, carbon, and crystals of mineral such as calcite, quartz, sillimanite, and mica, identified by the Raman spectrum. The FTIR spectra showed the characteristic peaks of 2405 and 2160 cm<sup>−1</sup> and a 3223 cm<sup>−1</sup> peak in all samples, which can be accompanied by the 3112 cm<sup>−1</sup> shoulder, 3301, and 3412 and 3432 cm<sup>−1</sup> peaks. The UV-Vis spectra showed an Fe-related peak at 440 nm, along with the 650–660 nm band and the absorption band in the blue zone of visible light. Chemical analyses via EDXRF showed a composition poor in V and Cr and rich in Fe. The spectral and chemical results could help explain the origin of the canary yellow color, which originates from the abundant amount of Fe with very little influence from Cr and V. |
| first_indexed | 2024-03-09T16:54:59Z |
| format | Article |
| id | doaj.art-aaf906dd064c458996fbec5cef074867 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T16:54:59Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-aaf906dd064c458996fbec5cef0748672023-11-24T14:36:49ZengMDPI AGCrystals2073-43522023-11-011311158010.3390/cryst13111580Gemological, Spectral and Chemical Features of Canary Yellow ChrysoberylYujie Gao0Xu Li1Yansheng Cheng2Tiantian Huang3Kongliang Li4Bo Xu5Ruobin Tang6Guild Gem Laboratories, Shenzhen 518020, ChinaShenzhen Academy of Inspection and Quarantine, Shenzhen 518010, ChinaChina National Accreditation Service for Conformity Assessment, Beijing 100062, ChinaGuild Gem Laboratories, Shenzhen 518020, ChinaCollege of Geology and Construction Engineering, Anhui Technical College of Industry and Economy, Hefei 230051, ChinaState Key Laboratory of Geological Processes and Mineral Resources, School of Gemmology, China University of Geosciences, Beijing 100083, ChinaIndependent Researcher, Chengdu 610000, ChinaIn this study, seventeen faceted gem-quality chrysoberyls exhibiting an attractive canary yellow color were investigated using a variety of gemological, spectral, and chemical methods. Microscopic observation revealed the presence of distinct growth lines and inclusions, including CO<sub>2</sub> fluids, carbon, and crystals of mineral such as calcite, quartz, sillimanite, and mica, identified by the Raman spectrum. The FTIR spectra showed the characteristic peaks of 2405 and 2160 cm<sup>−1</sup> and a 3223 cm<sup>−1</sup> peak in all samples, which can be accompanied by the 3112 cm<sup>−1</sup> shoulder, 3301, and 3412 and 3432 cm<sup>−1</sup> peaks. The UV-Vis spectra showed an Fe-related peak at 440 nm, along with the 650–660 nm band and the absorption band in the blue zone of visible light. Chemical analyses via EDXRF showed a composition poor in V and Cr and rich in Fe. The spectral and chemical results could help explain the origin of the canary yellow color, which originates from the abundant amount of Fe with very little influence from Cr and V.https://www.mdpi.com/2073-4352/13/11/1580chrysoberylRamantrace elementsCIELab |
| spellingShingle | Yujie Gao Xu Li Yansheng Cheng Tiantian Huang Kongliang Li Bo Xu Ruobin Tang Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl Crystals chrysoberyl Raman trace elements CIELab |
| title | Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl |
| title_full | Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl |
| title_fullStr | Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl |
| title_full_unstemmed | Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl |
| title_short | Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl |
| title_sort | gemological spectral and chemical features of canary yellow chrysoberyl |
| topic | chrysoberyl Raman trace elements CIELab |
| url | https://www.mdpi.com/2073-4352/13/11/1580 |
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