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

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[R1-12] Rare Mixed typeⅡb and typeⅠ(Boron and Nitrogen Centers) Natural Diamond

*Hiroshi KITAWAKI¹, Kentaro Emori¹, Mio Hisanaga¹, Masahiro Yamamoto¹, Kenji Watanabe², Hisao Kanda³ (1. Central Gem Laboratory, 2. NIMS, 3. former NIMS)

Keywords:

Naural blue diamond,fancy color diamond,diamond type

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