Graphite-bearing crystalline schist, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021

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Graphite-bearing crystalline schist, Jimmu Mine, Sogo, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe

石墨を含む結晶片岩（広島県三原市宗郷神武鉱山）

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