Galena with sphalerite and calcite from Hilfe Gottes mine, Grund mine, Bergstadt Bad Grund, Bad Grund, Göttingen District, Lower Saxony, Germany, photo width: 62 mm, private collection, 2021 by Katsuaki Watanabe
方鉛鉱・閃亜鉛鉱・方解石（ドイツ産、写真の横幅：62 mm、個人蔵）
211118_kitagawa-collection-2b_DSC00836_Lr_galena
