[R1] R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan) | 2026 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

2026 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

Session Details

Oral presentationR1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

Thu. Sep 24, 2026 9:30 AM - 11:45 AM JST
Thu. Sep 24, 2026 12:30 AM - 2:45 AM UTC

Room B (285)

Chairperson:Yasuyuki Banno, Hiroshi Kitawaki, Masanori Kurosawa

9:30 AM - 10:00 AM JST(12:30 AM - 1:00 AM UTC)Invited Lecture

[R1-01]Gem-Quality Diamonds: Status and Identification

*Shoko Odake¹ (1. GIA Tokyo Godokaisha)

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[R1-02]Demantoid Garnet: Characterization for origin determination

*Kentaro EMORI¹, Zhenghao Zhao¹, Kanako Taniguchi¹, Hiroshi Kitawaki¹ (1. Central Gem Laboratory)

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[R1-03]Geographic Origin Determination of Alexandrite: An Investigation Based on Spectroscopic Characteristics and Trace Element Composition

*Zhenghao Zhao¹, Hiroshi Kitawaki¹, Kentaro Emori¹, Makoto Okano¹ (1. Central Gem Laboratory)

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[R1-04]Geographic origin determination of gem-quality olivine (peridot)

*Makoto MIURA¹, Aaron C. Palke², Mike C. Jollands³, Ziyin Sun², Wim Vertriest⁴, Yusuke Katsurada¹, Kazuko Saruwatari¹, Takashi Mikouchi⁵ (1. GIA Tokyo, 2. GIA Carlsbad, 3. GIA New York, 4. GIA Bangkok, 5. Univ. of Tokyo)

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[R1-05]Systematic investigation of natural related beryllium and heavy high field strength elements (HHFSE) in blue sapphire nanoparticle inclusions

*Ahmadjan ABDURIYIM¹ (1. Tokyo Gem Science LLC)

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[R1-06]4D-STEM analysis of TiO₂-rich nano-inclusions in sapphires from Madagascar

*Yohei IGAMI¹, Akira MIYAKE¹, Seika Oto¹, Kentaro Emori² (1. Kyoto University, 2. Central Gem Laboratory)

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[R1-07]Intensity Tensor and Peak Separation of Mössbauer Quadrupole Doublet of Fe²⁺ of Amphibole Single Crystal

*Keiji SHINODA¹, Machi Maruoka¹, Yasuhiro Kobayashi² (1. Osaka Met. Univ. Sci., 2. KURNS)

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[R1-08]Intensity tensors of quadrupole doublets of Fe²⁺ and Fe³⁺ in Hornblende by Mössbauer spectroscopy.

*Machi Tanaka¹, Keiji Shinoda¹, Yasuhiro Kobayashi² (1. Osaka Metropolitan Univ. Sci., 2. KURNS.)

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