"Transparent reddish pink grains of piemontite in schist (quartz-muscovite-piemontite). This specimen was a gift to Dr. Tarassoff from Professors A. Yazawa and Professor Nambu, Research Inst. of Mineral Dressing and Metallurgy, Tohoku, University, Sendai, Japan; May 1969."
Following the discovery of a major copper deposit in 1690, the Besshi Copper Mine, located in the southeast of Niihama City in Ehime Prefecture, opened in 1691. Copper production continued there for 283 years through the Edo, Meiji, Taisho, and Showa periods until the mine closed in 1973.*
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