Fluorite Mine (Herzog Shaft), Straßberg, Harzgerode, Harz Mts, Saxony-Anhalt, Germany

Ancient lead and silver mine. During the 18th and 19th centuries, the main ore was argentiferous galena, included in calcite-quartz-siderite-fluorite veins of the Biwend (or: Lindenberg) vein system ('Biwender Gangzug', 'Lindenberger Gangzug'). The geological structure of these veins is very similar to those of the Neudorf-Straßberg vein system worked a little further south (see: Neudorf). In the late 20th century, the mine was worked for fluorite until its closure in 1991. The shaft was also used to extract the ores mined at Glasebach and Brachmannsberg mines, to which it was connected underground.
Located 2 km north of Straßberg and about 7 km WSW of Harzgerode.