Pyrite

specimen number:
2062874

location:
Leonard Mine, Butte, Montana, USA

description:
Classic specimen for this area, bright lustrous golden crystals of pyrite to 2.3 and centimeter in size covering the top of matrix. This is in good condition with very minimal micro-damage present. The specimen comes with a previous label from the collection of Ray DeMark.

The Leonard Mine in Butte, Montana, is situated within the rich Late Cretaceous quartz monzonite of the Boulder batholith, where extensive hydrothermal activity formed complex veins and fractured ore zones containing abundant copper minerals. Developed in the late 19th century and named after mining executive Leonard Lewisohn, the mine became a major underground producer of copper and associated metals during the height of the Butte mining district's industrial boom. Over the decades, it evolved into a prominent underground workings site celebrated historically for both its massive ore output and as a frequent destination for visiting dignitaries, before deep underground operations across the district permanently ceased.

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