Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan
This study focusses on the spectroscopic observation of marbles, rubies and the transition zone between ruby and its hosted marble that may distinguish the origin of ruby. Samples of ruby-bearing marble were obtained from Afghanistan, Myanmar, and Pakistan. Energy-dispersive X-ray fluorescence was u...
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2024-11-01
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| author | Chen Fan Yung-Chin Ding Wing-Tak Lui |
| author_facet | Chen Fan Yung-Chin Ding Wing-Tak Lui |
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| description | This study focusses on the spectroscopic observation of marbles, rubies and the transition zone between ruby and its hosted marble that may distinguish the origin of ruby. Samples of ruby-bearing marble were obtained from Afghanistan, Myanmar, and Pakistan. Energy-dispersive X-ray fluorescence was used to analyze the chemical compositions. Although the content of other elements in the marble varied with the origin, the Cl content was quite constant. A diagram of the trace elements Fe and Ga was used to determine the origins of the marble-hosted rubies. X-ray diffraction was used to verify the structure phases, where trioctahedral mica, plagioclase, quartz, and alkali feldspar were found in marbles. Ultraviolet–visible spectrophotometry was used for rubies, where a 659 nm fluoresce peak was found in the Myanmar ruby sample, which could make Myanmar ruby redder and more sought after. The bonding of elements and inclusions of the samples were analyzed using Fourier transform infrared spectroscopy, Raman spectroscopy, and photoluminescence. A FTIR peak at 630 cm<sup>−1</sup> is found to be useful in judging the temperature of ruby formation. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to analyze the variation of the transition zone, which revealed that the boundary was a gradation zone. Concentrations of Al<sub>2</sub>0<sub>3</sub> increased in this zone, but CaCO<sub>3</sub> concentrations decreased. |
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| spelling | doaj-art-6122ea9f7d294cc7b3d05438a00b02e72025-08-20T02:28:08ZengMDPI AGCrystals2073-43522024-11-01141198510.3390/cryst14110985Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and PakistanChen Fan0Yung-Chin Ding1Wing-Tak Lui2Institute of Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, TaiwanInstitute of Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, TaiwanTaiwan Central Gem Laboratory, Taipei 10403, TaiwanThis study focusses on the spectroscopic observation of marbles, rubies and the transition zone between ruby and its hosted marble that may distinguish the origin of ruby. Samples of ruby-bearing marble were obtained from Afghanistan, Myanmar, and Pakistan. Energy-dispersive X-ray fluorescence was used to analyze the chemical compositions. Although the content of other elements in the marble varied with the origin, the Cl content was quite constant. A diagram of the trace elements Fe and Ga was used to determine the origins of the marble-hosted rubies. X-ray diffraction was used to verify the structure phases, where trioctahedral mica, plagioclase, quartz, and alkali feldspar were found in marbles. Ultraviolet–visible spectrophotometry was used for rubies, where a 659 nm fluoresce peak was found in the Myanmar ruby sample, which could make Myanmar ruby redder and more sought after. The bonding of elements and inclusions of the samples were analyzed using Fourier transform infrared spectroscopy, Raman spectroscopy, and photoluminescence. A FTIR peak at 630 cm<sup>−1</sup> is found to be useful in judging the temperature of ruby formation. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were used to analyze the variation of the transition zone, which revealed that the boundary was a gradation zone. Concentrations of Al<sub>2</sub>0<sub>3</sub> increased in this zone, but CaCO<sub>3</sub> concentrations decreased.https://www.mdpi.com/2073-4352/14/11/985element migrationgeographic origintransition zoneruby-bearing marble659 nm peak630 cm<sup>−1</sup> transmission peak |
| spellingShingle | Chen Fan Yung-Chin Ding Wing-Tak Lui Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan Crystals element migration geographic origin transition zone ruby-bearing marble 659 nm peak 630 cm<sup>−1</sup> transmission peak |
| title | Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan |
| title_full | Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan |
| title_fullStr | Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan |
| title_full_unstemmed | Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan |
| title_short | Preliminary Spectroscopic Observations of Marble-Hosted Rubies, Marginal Host Marbles, and Transition Zones Between Marbles and Rubies on Samples from Afghanistan, Myanmar, and Pakistan |
| title_sort | preliminary spectroscopic observations of marble hosted rubies marginal host marbles and transition zones between marbles and rubies on samples from afghanistan myanmar and pakistan |
| topic | element migration geographic origin transition zone ruby-bearing marble 659 nm peak 630 cm<sup>−1</sup> transmission peak |
| url | https://www.mdpi.com/2073-4352/14/11/985 |
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