Datolite

specimen number:
1791266

location:
Delaware Mine, Keweenaw Co., Michigan, USA

description:
Matching set of cut and polished datolite. Great color.

The Delaware Mine, located in Keweenaw County, Michigan, was established during the American copper boom and operated from 1847 until 1887. Geologically, the site is set within the rugged terrain of the Keweenaw Peninsula, featuring ancient Proterozoic basaltic lava flows and interflow sedimentary layers, notably the Allouez Conglomerate and local fissure veins. Its mineralogy is world-renowned for native copper deposits, along with associated secondary minerals typical of the region's unique hydrothermal alteration history.

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