The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds
High-temperature and high-pressure (HTHP)-treated diamonds have attracted attention all over the world due to their vivid colors. In order to explore a new method for the rapid and non-destructive identification of HTHP-treated diamonds, in this paper, five IaAB-type diamonds yielded in Russia were...
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MDPI AG
2024-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/14/7/3071 |
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| author | Mu-Lin Huang Xue-Mei He Ming-Yue Du Peng-Fei Jiang Xue-Feng Wang |
| author_facet | Mu-Lin Huang Xue-Mei He Ming-Yue Du Peng-Fei Jiang Xue-Feng Wang |
| author_sort | Mu-Lin Huang |
| collection | DOAJ |
| description | High-temperature and high-pressure (HTHP)-treated diamonds have attracted attention all over the world due to their vivid colors. In order to explore a new method for the rapid and non-destructive identification of HTHP-treated diamonds, in this paper, five IaAB-type diamonds yielded in Russia were selected as the research object and treated with HTHP. The HTHP-treated diamonds were investigated by DiamondView<sup>TM</sup>, cathodoluminescence, micro-infrared spectrometry (micro-IR), low-temperature photoluminescence (PL) spectrometry, and three-dimensional (3D) fluorescence spectrometry. The results show that under DiamondView<sup>TM</sup> and cathode rays, the five samples were all non-phosphorescent with different luminous patterns, such as regular annular bands, multiple groups of intersecting linear stripes, or jagged stripes. In the low-temperature PL spectra, most HTHP-treated diamonds exhibited stronger luminescence peaks at 637 nm compared to 575 nm. But there were also exceptions, such as the purple-red sample showing the opposite luminescence peak. In the 3D fluorescence spectrum of the HTHP-treated diamonds, the fluorescence peak mainly appeared in the range of 440–450 nm, accompanied by a broad band of 350–500 nm and even longer wavelengths. Meanwhile, some samples also exhibited fluorescence peaks at longer wavelengths, such as 353 nm, 676 nm, and 665 nm. These results make it possible to identify HTHP-treated diamonds by using luminescence characteristics, providing a new method for the non-destructive and rapid detection of HTHP-treated diamonds. |
| first_indexed | 2024-04-24T10:49:23Z |
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| language | English |
| last_indexed | 2024-04-24T10:49:23Z |
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| series | Applied Sciences |
| spelling | doaj.art-e0631b07a89847fbb85135cbd55acb372024-04-12T13:15:36ZengMDPI AGApplied Sciences2076-34172024-04-01147307110.3390/app14073071The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated DiamondsMu-Lin Huang0Xue-Mei He1Ming-Yue Du2Peng-Fei Jiang3Xue-Feng Wang4National Gems & Jewelry Testing Group, Beijing Education Technology Co., Ltd., Beijing 100013, 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, ChinaHigh-temperature and high-pressure (HTHP)-treated diamonds have attracted attention all over the world due to their vivid colors. In order to explore a new method for the rapid and non-destructive identification of HTHP-treated diamonds, in this paper, five IaAB-type diamonds yielded in Russia were selected as the research object and treated with HTHP. The HTHP-treated diamonds were investigated by DiamondView<sup>TM</sup>, cathodoluminescence, micro-infrared spectrometry (micro-IR), low-temperature photoluminescence (PL) spectrometry, and three-dimensional (3D) fluorescence spectrometry. The results show that under DiamondView<sup>TM</sup> and cathode rays, the five samples were all non-phosphorescent with different luminous patterns, such as regular annular bands, multiple groups of intersecting linear stripes, or jagged stripes. In the low-temperature PL spectra, most HTHP-treated diamonds exhibited stronger luminescence peaks at 637 nm compared to 575 nm. But there were also exceptions, such as the purple-red sample showing the opposite luminescence peak. In the 3D fluorescence spectrum of the HTHP-treated diamonds, the fluorescence peak mainly appeared in the range of 440–450 nm, accompanied by a broad band of 350–500 nm and even longer wavelengths. Meanwhile, some samples also exhibited fluorescence peaks at longer wavelengths, such as 353 nm, 676 nm, and 665 nm. These results make it possible to identify HTHP-treated diamonds by using luminescence characteristics, providing a new method for the non-destructive and rapid detection of HTHP-treated diamonds.https://www.mdpi.com/2076-3417/14/7/3071gem-grade diamondsHTHP treatedphotoluminescence3D contour fluorescence plot |
| spellingShingle | Mu-Lin Huang Xue-Mei He Ming-Yue Du Peng-Fei Jiang Xue-Feng Wang The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds Applied Sciences gem-grade diamonds HTHP treated photoluminescence 3D contour fluorescence plot |
| title | The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds |
| title_full | The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds |
| title_fullStr | The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds |
| title_full_unstemmed | The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds |
| title_short | The Characteristics of Luminescence from High-Temperature- and High-Pressure-Treated Diamonds |
| title_sort | characteristics of luminescence from high temperature and high pressure treated diamonds |
| topic | gem-grade diamonds HTHP treated photoluminescence 3D contour fluorescence plot |
| url | https://www.mdpi.com/2076-3417/14/7/3071 |
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