Here at CGL we are involved in a wide range of gemology research and we continually offer this information through CGL News.
In addition, CGL is actively involved in many academic organizations in Japan and around the world so that we are able to gather the latest information and exchange information regarding gemology research.
CGL has participated academic conferences and published scientific publications as below.
| Name of Academic Journal | Title | Author |
|---|---|---|
| Journal of the Gemmological Society of Japan, 34(1-4) November, 2014 | Radioactive “Morganite” | Hiroshi Kitawaki Yoichi Horikawa Katsumi Shozugawa (Graduate School of Arts and Sciences, University of Tokyo) Norio Nogawa (Radioisotope Center, University of Tokyo) |
| The Journal of Gemmology,34(2),2014 | Beryllium-Diffused Corundum in the Japanese Market, and Assessing the Natural vs. Diffused Origin of Beryllium in Sapphire | Kentaro Emori Hiroshi Kitawaki Makoto Okano |
| NEW DIAMOND(Japan New Diamond Forum),112,2014.1 | Gem quarity CVD synthetic diamonds, Current Situation and its gem identification technique. |
Hiroshi Kitawaki |
| Gems & Gemology, Spring 2013 | Undisclosed samples of large CVD synthetic diamond | Hiroshi Kitawaki Masahiro Yamamoto Mio Hisanaga Makoto Okano Kentaro Emori |
| Gems & Gemology, Spring 2012 | Radioactive Morganite | Hiroshi Kitawaki Yoichi Horikawa Katsumi Shozugawa (Graduate School of Ard and Science at the University of Tokyo) Norio Nogawa (Radioisotope Center at the University of Tokyo) |
| GEMMOLOGIE, Jahrgang 55, Heft 1/2, Juni 2006 | Neues Vorkommen kupferfuhrender Turmaline in Mosambik | C.C. Milisenda Yoichi Horikawa Kentaro Emori K. Miranda F.H. Bank U. Henn |
| GEMMOLOGIE, Jahrgang 54, Heft 1, März 2005 | Rubine mit bleihaltigen Glasern gefullt | C.C. Milisenda Yoichi Horikawa U. Henn |
| The Journal of Gemmology,27(5),2001 | Identification of a new type of laser treatment (KM treatment) of diamonds | Yoichi Horikawa |
| Date | Presentation Location | Title | Presenter |
|---|---|---|---|
| 2014/12/8 | GIT2014 (The 4th International Gem and Jewelry Conference) |
Peculiar Natural Type II Diamonds showing Pseudo-Synthetic Characteristics | Hiroshi Kitawaki* Mio Hisanaga Masahiro Yamamoto Kentaro Emori |
| 2014/12/8 | Geographic Origin Determination of Ruby and Blue Sapphire: An Application of LA-ICP-MS | Kentaro Emori* Hiroshi Kitawaki |
|
| 2014/9/19 | 2014 Annual Meeting of Japan Association of Mineralogical Sciences (Kumamoto Univ.) |
Geographic origin determination of gem corundum – Its accuracy and limitation | Hiroshi Kitawaki* Kentaro Emori |
| Geographic origin determination of gem corundum – Application of LA-ICP-MS | Hiroshi Kitawaki* Kentaro Emori |
||
| 2014/6/14 | The Gemmological Society of Japan Ehime Univ. | Peculiar Natural Type II Diamonds Showing Pseudo-Synthetic Characteristics | Mio Hisanaga* Hiroshi Kitawaki Masahiro Yamamoto Kentaro Emori |
| 2013/10/14 | IGC2013 (International Gemmological Conference) Hanoi(Vietnam) |
The present situation of Beryllium diffusion corundum | Kentaro Emori* Hiroshi Kitawaki Makoto Okano |
| 2013/10/13 | Identification of gem diamonds using high-energy UV luminescence imaging | Hiroshi Kitawaki* Mio Hisanaga Masahiro Yamamoto |
|
| 2013/9/12 | 2013 Annual Meeting of Japan Association of Mineralogical Sciences (Tsukuba Univ.) |
Analysis of Gem Corundum Containing Beryllium Using LA-ICP-MS | Kentaro Emori* Hiroshi Kitawaki |
| Characterization and Identification of Gem Quality CVD Synthetic Diamonds | Hiroshi Kitawaki* Mio Hisanaga Masahiro Yamamoto Makoto Okano Kentaro Emori |
||
| 2013/6/15 | The Gemmological Society of Japan Chichibu City Saitama Pref. | Undisclosed CVD synthetic diamonds 1ct and over | Mio Hisanaga* Hiroshi Kitawaki Masahiro Yamamoto Makoto Okano Kentaro Emori |
| Current State of Beryllium Dispersed Heat Treated Sapphire Identification | Kentaro Emori* Hiroshi Kitawaki Makoto Okano |
||
| 2012/12/13 | GIT2012 (The 3rd International Gem and Jewelry Conference) |
Identification of Natural and Synthetic Ruby with LA-ICP-MS Analysis | Kentaro Emori Hiroshi Kitawaki* |
| 2012/12/12 | Reconsideration about Nomenclature of the Gemological term ‘Hisui (Fei Cui)’ | Hiroshi Kitawaki Yoichi Horikawa* |
|
| 2012/9/21 | 2012 Annual Meeting of Japan Association of Mineralogical Sciences (Kyoto Univ.) |
Application of LA-ICP-MS in Gemological Field ~ Identification of Natural and Synthetic Ruby | Kentaro Emori* Hiroshi Kitawaki Makoto Okano |
| Study of Mineral Inclusion and CL Images of Gem Quality Natural Diamonds – Suggestions to Comprehension of Growth History of Diamonds – | Hiroshi Kitawaki* | ||
| 2012/6/9 | The Gemmological Society of Japan Ise City Mie Pref. | Identification of Natural and Synthetic Ruby using LA-ICP-MS. | Kentaro Emori* Hiroshi Kitawaki Makoto Okano |
| Identification of Natural vs. Synthetic diamonds using UV-Luminescence Images. | Mio Hisanaga* Hiroshi Kitawaki Masahiro Yamamoto |
