Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification
Chinese HPHT diamonds have improved dramatically in recent years. However, this brings a challenge in identifying type IIa colorless diamonds. In this study, eleven HPHT and three natural, colorless, gem-quality IIa diamonds were analyzed using magnified observation, Raman, PL and chemical element a...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-09-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/12/9/1266 |
| _version_ | 1827662088404729856 |
|---|---|
| author | Ying Ma Zhili Qiu Xiaoqin Deng Ting Ding Huihuang Li Taijin Lu Zhonghua Song Wenfang Zhu Jinlin Wu |
| author_facet | Ying Ma Zhili Qiu Xiaoqin Deng Ting Ding Huihuang Li Taijin Lu Zhonghua Song Wenfang Zhu Jinlin Wu |
| author_sort | Ying Ma |
| collection | DOAJ |
| description | Chinese HPHT diamonds have improved dramatically in recent years. However, this brings a challenge in identifying type IIa colorless diamonds. In this study, eleven HPHT and three natural, colorless, gem-quality IIa diamonds were analyzed using magnified observation, Raman, PL and chemical element analysis. The results show that only HPHT samples possessed kite-like inclusions and lichenoid inclusions, as verified by their complex Raman spectra (100–750 cm<sup>−1</sup>). Through PL mapping, HPHT and natural IIa diamonds were distinguished by their growth environments, which were reflected by PL peaks at 503, 505, 575, 637, 693, 694 and 737 nm. The chemical components of HPHT IIa diamond carbide inclusions are mainly Fe, Co, Ni and Mn, but those of Natural IIa are mainly Fe and Ni. As a result, the chemical components can be used to distinguish a natural colorless IIa diamond from a synthetic diamond. |
| first_indexed | 2024-03-10T00:20:14Z |
| format | Article |
| id | doaj.art-cf635f4edf1f42f88fd7e6e46e3eb896 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T00:20:14Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-cf635f4edf1f42f88fd7e6e46e3eb8962023-11-23T15:44:15ZengMDPI AGCrystals2073-43522022-09-01129126610.3390/cryst12091266Chinese Colorless HPHT Synthetic Diamond Inclusion Features and IdentificationYing Ma0Zhili Qiu1Xiaoqin Deng2Ting Ding3Huihuang Li4Taijin Lu5Zhonghua Song6Wenfang Zhu7Jinlin Wu8National Gemstone Testing Center Shenzhen Lab. Company Ltd., ShenZhen 518000, ChinaSchool of Earth Sciences and Engineering, Sun Yat-sen University, GuangZhou 510275, ChinaSchool of Earth Sciences and Engineering, Sun Yat-sen University, GuangZhou 510275, ChinaNational Gemstone Testing Center Shenzhen Lab. Company Ltd., ShenZhen 518000, ChinaNational Gemstone Testing Center Shenzhen Lab. Company Ltd., ShenZhen 518000, ChinaJewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaJewelry Technology Administrative Center, Ministry of Natural Resources, Beijing 100013, ChinaNational Gemstone Testing Center Shenzhen Lab. Company Ltd., ShenZhen 518000, ChinaNational Gemstone Testing Center Shenzhen Lab. Company Ltd., ShenZhen 518000, ChinaChinese HPHT diamonds have improved dramatically in recent years. However, this brings a challenge in identifying type IIa colorless diamonds. In this study, eleven HPHT and three natural, colorless, gem-quality IIa diamonds were analyzed using magnified observation, Raman, PL and chemical element analysis. The results show that only HPHT samples possessed kite-like inclusions and lichenoid inclusions, as verified by their complex Raman spectra (100–750 cm<sup>−1</sup>). Through PL mapping, HPHT and natural IIa diamonds were distinguished by their growth environments, which were reflected by PL peaks at 503, 505, 575, 637, 693, 694 and 737 nm. The chemical components of HPHT IIa diamond carbide inclusions are mainly Fe, Co, Ni and Mn, but those of Natural IIa are mainly Fe and Ni. As a result, the chemical components can be used to distinguish a natural colorless IIa diamond from a synthetic diamond.https://www.mdpi.com/2073-4352/12/9/1266HPHT diamondinclusionPL mappingchemical components |
| spellingShingle | Ying Ma Zhili Qiu Xiaoqin Deng Ting Ding Huihuang Li Taijin Lu Zhonghua Song Wenfang Zhu Jinlin Wu Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification Crystals HPHT diamond inclusion PL mapping chemical components |
| title | Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification |
| title_full | Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification |
| title_fullStr | Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification |
| title_full_unstemmed | Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification |
| title_short | Chinese Colorless HPHT Synthetic Diamond Inclusion Features and Identification |
| title_sort | chinese colorless hpht synthetic diamond inclusion features and identification |
| topic | HPHT diamond inclusion PL mapping chemical components |
| url | https://www.mdpi.com/2073-4352/12/9/1266 |
| work_keys_str_mv | AT yingma chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT zhiliqiu chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT xiaoqindeng chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT tingding chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT huihuangli chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT taijinlu chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT zhonghuasong chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT wenfangzhu chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification AT jinlinwu chinesecolorlesshphtsyntheticdiamondinclusionfeaturesandidentification |