211108_private-collection_DSC00505_Lr_ashio-copper-ore

Chalcopyrite from Ashio Copper Mine, Nikko-shi, Tochigi, private collection, 2021 by Katsuaki Watanabe

黄銅鉱（足尾銅山の銅鉱石）（栃木県日光市足尾銅山産、個人蔵）