Abstract of Papers Presented at Annual Meeting of the Gemmological Society of Japan

Abstract of Papers Presented at Annual Meeting of the Gemmological Society of Japan

Published by The Gemmological Society of Japan

441 registered articles
(updated on October 04, 2025)

CONFERENCE PROCEEDINGS FREE ACCESS

2025 Annual Meeting

HPHT laboratory grown diamond with strain and GR1 Shoko Odake
Characteristics of Blue Sapphire from Hainan, China Zhao Zhenghao, Kentaro Emori, Hiroshi Kitawaki
Growth and characteristics of bicolor Fe doped spinel Toru Katsumata, Ayaka Kojima, Miu Kouno, Kotomi Kimura
Verification about Crystal Growth Process of Trapiche Ruby. Yasushi Takahashi, Toshiya Atumi, Junji Yamanaka, Keisuke Arimoto, Chiaya Yamamoto, Satoki Shinozuka, Ryunosuke Kawamura, Takuma Ampo

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1

Blue opal from Akase, Ishikawa, Japan

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* Ayano Nakajima, Masaki Furuya
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“Japanese” Trapiche garnet: Gemology and Mineralogy of alluvial garnet from Mt. Nijyo, Nara

Released on J-STAGE: July 07, 2025 | 2025 Annual Meeting Pages 4

* Makoto Miura, Jie Ren
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The origin of the cloudiness part (Egg) in opal.

Released on J-STAGE: July 07, 2025 | 2025 Annual Meeting Pages 8

* Yasushi Takahashi, Yuki Haraguchi, Junji Yamanaka, Keisuke Arimoto, Chiaya Yamamoto, Takuma Ampo
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The health benefits and earth history hidden in Kuji amber

Released on J-STAGE: July 07, 2025 | 2025 Annual Meeting Pages 1-2

* Ken-ichi Kimura
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Understanding and Determining the Color Origin of Green Diamonds

Released on J-STAGE: July 07, 2025 | 2025 Annual Meeting Pages 9

* Ahmadjan Abduriyim

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