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

[R1-11] Willemseite from the Hamayokawa mine, Nagano Prefecture, Japan

*Satoshi Matsubara¹, Koichi Momma¹, Norio Yanagisawa², Yoko Kusaba¹, Akiko Tokumoto¹, Ritsuro Miyawaki¹ (1. National Museum of Nature and Science, 2. Geological Survey of Japan, AIST)

Keywords:suzukiite, willemseite, Hamayokokawa mine