Siderite

specimen number:
1052776

location:
Stolberg, Sudharz, Mansfeld-Sudharz, Saxony-Anhalt, Germany

description:
Great color contrast on this one, lustrous rhombohedral crystals of siderite across a red hematite rich matrix. Minimal damage present, I think this is still in good condition. The specimen comes with an antique label as shown at the end of the video. This label provides an acquisition date of 1908.

The Stolberg mining district, situated in the southern Harz Mountains of Saxony-Anhalt, Germany, was a historic and highly significant center for the extraction of silver-bearing galena, sphalerite, and fluorite. Geologically, the area is characterized by hydrothermal vein systems, most notably the famous Fluss-Schacht vein, which cut through folded Paleozoic-age sedimentary rocks, including Devonian limestones and Carboniferous slates, near the eastern margin of the Ramberg granite intrusion. Ascending mineral-rich fluids deposited dense sequences of fluorite, baryte, and calcite alongside rich pockets of lead and zinc sulfides, which later underwent near-surface oxidation to produce secondary minerals like cerussite and chalcanthite. Historically, surface quarrying and underground prospecting for silver and lead date back to the early Middle Ages, with formal documentation of organized mining guilds appearing by the fourteenth century. Industrial-scale operations expanded during the eighteenth and nineteenth centuries under the oversight of the Counts of Stolberg, utilizing deep shaft networks to supply regional smelters and mints. As the high-grade silver-lead ores became exhausted, the mining focus shifted heavily toward extracting industrial-grade fluorite and baryte during the twentieth century, particularly during the post-World War II era under East German state enterprises, until changing global market dynamics and the depletion of economic reserves led to the permanent cessation of all commercial mining operations in the Stolberg sector in the late 1980s.

Ernst August Boettcher (often spelled Boettcher or Boettcher in historical records), operating from Berlin, Germany, during the late nineteenth and early twentieth centuries, was a highly successful natural history dealer and commercial merchant who distributed premier geological, mineralogical, and zoological materials to prominent museums and private collectors worldwide. Inheriting the established firm in 1900 following the death of his father, August Boettcher, he systematically expanded the business under the commercial title Naturalien- und Lehrmittel-Anstalt Ernst A. Boettcher, building a vast trading network headquartered at Bruederstrasse 15 in Berlin. While Boettcher achieved considerable scientific renown in entomology as a specialized collector and describer of lepidoptera, his dealership simultaneously functioned as a major European hub for educational supply suites, offering highly curated collections of minerals, rocks, and paleontological specimens structured specifically for academic instruction in mineralogy and economic geology. His exceptional organizational skill and high-quality educational displays earned the firm a prestigious Gold Medal at the St. Louis World Fair in 1904, solidifying his international reputation. His commercial operations remained highly influential through the 1910s and 1920s, continuing to supply verified European mineral specimens to institutions like the Berlin Natural History Museum, with the enterprise maintaining a registered commercial presence in the Berlin business directories well into the 1940s.

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