Chalcophyllite

specimen number:
2351003

location:
Majuba Hill mine, Pershing Co., Nevada, USA

description:
Attractive sky-blue platy crystals of chalcophyllite lying flat across the top of matrix. Nice example for the species. In good condition.

The geology of the Majuba Hill mine in Pershing County, Nevada, consists of a complex Tertiary rhyolite intrusive plug and associated breccia masses that cut through older sedimentary rocks, hosting multi-metal mineralization related to a hydrothermal system. Discovered in 1907 with subsequent underground development beginning around 1914, the historic mine experienced intermittent production periods primarily targeting high-grade surface and underground deposits through a series of adits and tunnels. Over the decades, small-scale operations extracted notable quantities of metal ores, while modern exploration continues to evaluate the site as a porphyry system.

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