Calcite with Dolomite

specimen number:
2312085

location:
120m level, Pohla, Schwarzenberg, Saxony, Germany

description:
Dark rhombohedral lustrous crystals of calcite to 2.2 cm in size on matrix with crystallized dolomite. This is in great condition.

The mining community of Pohla, located in the Ore Mountains of Saxony, Germany, has a long history of metal and mineral extraction dating back to the medieval era, with operations historically focused on silver, cobalt, nickel, and bismuth veins. Geologically, the area is set within a complex basement of Paleozoic metamorphic rocks intruded by Variscan granites, which served as the heat engine for extensive hydrothermal activity. Circulation of metal-bearing fluids through regional fault systems produced rich vein deposits. The old mines and underground workings are well known among mineral collectors for yielding diverse mineral specimens, including notable occurrences of uranium secondary minerals, barite, bismuth, cobalt-nickel arsenides, and associated carbonates.

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