Quartz from Ashio Copper Mine, Nikko-shi, Tochigi, width 23 mm (photographic portion), Chigakusha collection, 2023 by Katsuaki Watanabe
水晶／石英（栃木県日光市足尾銅山産、標本の写真部分の横幅23 mm、地学舎所蔵）
Member of #oxides 酸化物
Mindat.org: Quartz
Quartz from Ashio Copper Mine, Nikko-shi, Tochigi, width 23 mm (photographic portion), Chigakusha collection, 2023
