Marcasite

specimen number:
2063445

location:
Brochterbeck quarry, Tecklenburg, Steinfurt, Munster, North Rhine-Westphalia, Germany

description:
Bright sharp golden crystals of marcasite and groupings to 1.0 cm in size across the top of matrix. The entire cluster measures 4.5 x 1.5 x 1.2 cm in size. In good condition. The specimen comes with a previous label from the collection of Ray DeMark.

Located in the Teutoburg Forest region of North Rhine-Westphalia, the abandoned Brochterbeck quarry near Tecklenburg exposes sedimentary strata traditionally worked for local stone and aggregate production. The geology of the area is characterized by Cretaceous-aged limestone and associated sedimentary formations shaped by regional tectonic folding and faulting along the Munsterland basin margins. Industrial excavation at the site eventually ceased, transforming the old workings into a protected nature reserve and a restricted zone for commercial activities. Despite restricted access, the quarry gained minor local recognition among regional mineral collectors and hobbyists for yielding sulfide specimens, particularly crystallized forms of iron-bearing phases found within the carbonate host rock.

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