Gao, Y.; Li, X.; Cheng, Y.; Huang, T.; Li, K.; Xu, B.; Tang, R. Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl. Crystals2023, 13, 1580.
Gao, Y.; Li, X.; Cheng, Y.; Huang, T.; Li, K.; Xu, B.; Tang, R. Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl. Crystals 2023, 13, 1580.
Gao, Y.; Li, X.; Cheng, Y.; Huang, T.; Li, K.; Xu, B.; Tang, R. Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl. Crystals2023, 13, 1580.
Gao, Y.; Li, X.; Cheng, Y.; Huang, T.; Li, K.; Xu, B.; Tang, R. Gemological, Spectral and Chemical Features of Canary Yellow Chrysoberyl. Crystals 2023, 13, 1580.
Abstract
In this study, seventeen faceted gem-quality chrysoberyls exhibiting an attractive canary yellow color were investigated by a series of gemological, spectral, and chemical methods. Microscopic observation reveals distinct growth lines and inclusions, including CO2 fluids, carbon, and mineral crystals such as calcite, quartz, sillimanite, and mica, identified by the Raman spectrum. The FTIR spectrum exhibits the 2405 and 2160 cm-1 feature peaks and a 3223 cm-1 peak in all samples, which can be accompanied by the 3112 cm-1 shoulder, 3301, and 3412 and 3432 cm-1 peaks. The UV-Vis spectrum shows a Fe-related peak at 440 nm, along with the 650–660 nm band and the absorption band in the blue zone of the visible light. The chemical results of EDXRF reveal a V-poor, Cr-poor, and Fe-rich feature. The spectral and chemical results could contribute to explaining the origin of the canary yellow color, which originates from the abundant amount of Fe with very little influence from Cr or V.
Keywords
chrysoberyl; Raman; trace elements; CIELab
Subject
Environmental and Earth Sciences, Geochemistry and Petrology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
