Pyrite

specimen number:
9892177

location:
Fort Calhoun, Washington Co., Nebraska, USA

description:
Attractive bright lustrous golden cubic crystals of pyrite measuring to 0.4 cm in size covering a knob of matrix. In very good condition all around. Neat locality example for the species.

In Fort Calhoun, Washington County, Nebraska, USA, exposed rock formations of Pennsylvanian and Cretaceous age, including the Canville Limestone and Wea Shale, host distinct mineral deposits formed within shallow marine environments. Historic mining and quarrying activities in the area, particularly at local stone quarries, revealed these sedimentary layers and provided specimen access to field collectors. Pyrite occurs here primarily as well-formed nodules, brassy concretions, and crystalline clusters embedded within shale beds and limestone matrix, making Fort Calhoun a notable regional collecting locality for iron sulfide minerals.

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