Boracite

specimen number:
2282041

location:
Solvayhall, Bernburg, Sachsen-Anhalt, Germany

description:
A loose single crystal of boracite.

The Solvayhall shaft, located near Bernburg in the Saxony-Anhalt region of Germany, was a significant potash and rock salt mining facility that operated within the rich Stassfurt salt deposits. Geologically, the mine exploited extensive Zechstein evaporite layers of Permian age, where tectonic movements over millions of years created massive salt domes and anticlines rich in carnallite, sylvite, and halite. Mining operations at Solvayhall began with shaft sinking in the late 1890s, and commercial production of potash salts for agricultural fertilizer commenced around 1902 under the management of the Solvay company. The facility remained a vital industrial operation through the first half of the twentieth century, providing raw chemical materials through both World Wars and the post-war era. Following a major brine influx and subsequent flooding event in the late 1960s, the mine became unstable and all underground extraction operations were permanently halted in 1970.

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