Adv Search
Volume 14 Issue 4
Dec.  2012
Turn off MathJax
Article Contents
Abstract
References
Related Articles
SONG Zhong-hua, LAN Yan, SHEN Mei-dong, LU Tai-jin, KE Jie, LIU Jian-hui, ZHANG Yu-bing. Identification Characteristics of Undisclosed CVD Synthetic Diamonds Found Recently by NGTC[J]. Journal of Gems & Gemmology, 2012, 14(4): 30-34.
Citation: SONG Zhong-hua, LAN Yan, SHEN Mei-dong, LU Tai-jin, KE Jie, LIU Jian-hui, ZHANG Yu-bing. Identification Characteristics of Undisclosed CVD Synthetic Diamonds Found Recently by NGTC[J]. Journal of Gems & Gemmology, 2012, 14(4): 30-34.
shu

Identification Characteristics of Undisclosed CVD Synthetic Diamonds Found Recently by NGTC

  • 1. National Gemstone Testing Center, Beijing 100013, China;

  • 2. National Gemstone Testing Center, Shenzhen Laboratory, Shenzhen 518020, China

More Information
  • Received Date: July 23, 2012
    Graphical Abstract
    • Abstract
  • Early in 2012，NGTC labs in Shenzhen and Beijing investigated some naked and embedded diamonds which included some undisclosed CVD synthetic diamonds.It was found that these gemquality CVD synthetic diamonds are difficult to distinguish from natural diamonds by normal microscopic observation.However，they can be effectively identified with the help of some advanced analytical techniques，such as PL（Photoluminescence）and DiamondViewTM.The experiments show that the line at 737nm in the PL spectrum and the bluish green fluorescence，the blue phosphorescence together with characteristics of multi－layered structure in DiamondViewTMare the characteristics of these CVD synthetic diamonds.
    • FullText(HTML)
    • References (7)
  • [1]
    Martineau P M,Lawson S C,Taylor A J,et al.Identification of synthetic diamond grown using chemical vapor deposition(CVD)[J].Gem & Gemology,2004,40(1):2-25.
    [2]
    Wang W,Mose T M,Linares R C,et al.Gem-quality synthetic diamonds grown by a chemical vapor deposition(CVD)method[J].Gem & Gemology,2003,39(4):268-283.
    [3]
    Chaim E Z.Synthetics specifically“made to defraud”[J].Diamond International Briefs,2012,27(709):7 281-7 283.
    [4]
    Chaim E Z.Exposing the fraudulent undisclosed synthetic diamond trail[J].Diamond International Briefs,2012,27(710):7 291-7 298.
    [5]
    Wang W,Mose T M.Gem quality CVD synthetic diamonds from Gemesis[J].Gems & Gemology,2011,71(3):227-228.
    [6]
    国家珠宝玉石质量监督检验中心(NGTC).关于在国内市场发现化学气相沉积法合成钻石的情况通告[EB/OL].http://cn.worldmarte.com/index.php?app=news_front&act=news_content&id=276,2012-06-18.
    [7]
    DTC Research Center.Undisclosed submissions of CVD synthetics to grading laboratories[EB/OL].http://www.diamonds.net/news/FilesRep/Docs/DTC% 20Alert% 20-% 20Undisclosed% 20submissions% 20of%20CVD%20synthetics%20to%20grading%20laboratories.pdf,2012-07-13.
    • Related Articles

  • Related Articles

    [1]DING Yongkang, QIU Zhili, DENG Xiaoqin, MA Ying, LIANG Weizhang, SUN Yuan. High Precision FTIR Mapping Reveals the Nitrogen-Related Characteristic of Multi-Stage Growth Diamond from Mengyin[J]. Journal of Gems & Gemmology, 2024, 26(S1): 50-52.
    [2]SHAO Tian, LYU Fanglin, LUO Heng, LIU Taiqiao, Shen Andy Hsitien. Comparison between Greenish-Blue and Orange Phosphorescence in HPHT Synthetic Diamond[J]. Journal of Gems & Gemmology, 2024, 26(S1): 6-9.
    [3]SHAO Tian, LYU Fanglin, ZHANG Jinqiu, ZHANG Haikun, Shen Andy Hsitien. Phosphorescence Characteristic on Boron-Doped HPHT Synthetic Diamond Produced in China[J]. Journal of Gems & Gemmology, 2019, 21(S1): 1-3. DOI: 10.15964/j.cnki.027jgg.2019.S1.001
    [4]LU, Xiao-min, ZHANG Yu-bing, LAN Yan, DING Ting, SONG Zhong-hua, ZHANG Jian, LU Tai-jin, SHEN Mei-dong. Characteristics of Lamellar Growth Structure and Ultraviolet Fluorescence of CVD Synthetic Diamonds[J]. Journal of Gems & Gemmology, 2013, 15(3): 30-35.
    [5]WEI Ran, CHEN Hua, LU Tai-jin. Application of DiamondViewTM to Identification of Tourmaline Filled by Organics[J]. Journal of Gems & Gemmology, 2013, 15(1): 23-27,42.
    [6]HUANG Yi-lan, QI Li-jian, LI Chao-yang. Study of Spiral Growth Structure of Nacreous Layer from Pteria Penguin and Blister Pearl by AFM[J]. Journal of Gems & Gemmology, 2006, 8(4): 1-5.
    [7]YU Lian-gang, YANG Ming-xing. Special Growth Morphology and Genesis of Nacreous Layer of Hyriopsis Cumingi from E'zhou, Hubei Province[J]. Journal of Gems & Gemmology, 2006, 8(2): 25-29.
    [8]HUANG Yi-lan, QI Li-jian. Spiral Nucleating Growth of Nacreous Layer on Pteria Penguin and Blister Pearl Controlled by Organic Matrix[J]. Journal of Gems & Gemmology, 2006, 8(2): 20-24.
    [9]HUANG Yi-lan, QI Li-jian. Spiral Growth Structure and Its Mechanism of Nacreous Layer of Pteria Penguin and Blister Pearl From Sanya, Hainan Province[J]. Journal of Gems & Gemmology, 2005, 7(3): 14-19.
    [10]ZHANG Gang-sheng, HAO Yu-lan. Microscopic Morphology of Porcelaneous Layers on Surface of Freshwater Cultured Pearls[J]. Journal of Gems & Gemmology, 2004, 6(1): 1-3.

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (124) PDF downloads (27) Cited by()
    Related
    Email alert RSS
    二维码

    Supported by Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return