Cyanotrichite

specimen number:
2063752

location:
Grandview Mine, Coconino Co., Arizona, USA

description:
Beautiful deep blue crystallized cyanotrichite across the top of matrix. Minor green brochantite present. In good condition. The specimen comes with a previous label from the collection of Ray DeMark.

The Grandview Mine, situated on the South Rim of the Grand Canyon within Coconino County, Arizona, is one of the most famous historical mineral localities in the American Southwest. Originally prospected in 1890 by Ralph Cameron, the site was developed within a breccia pipe structure where hydrothermal solutions enriched fractures in the Mississippian Redwall Limestone with copper ores. Mine operations yielded exceptionally high-grade copper, but high transportation costs out of the canyon eventually led to its closure and eventual inclusion in Grand Canyon National Park. For collectors, the locality is legendary for producing some of the finest cyanotrichite specimens in the world, alongside vivid crusts and sprays of azurite, malachite, brochantite, and other secondary copper minerals. While collecting is now strictly prohibited due to its location on protected national park land, historic Grandview Mine specimens remain highly prized in mineralogy for their intense color contrast and pristine crystal habits.

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