Devilline

specimen number:
2354248

location:
Eaglebrook Mine, Ceredigion, Wales, UK

description:
Light blue crystalline and massive devilline across the top of matrix. Nice example for the species.

The Eaglebrook Mine, located in the historic mining district of Ceredigion, Wales, sits within Silurian-aged sedimentary sequences that were fractured during regional tectonic activity and subsequently mineralized by hydrothermal vein systems. Originally worked during the nineteenth century primarily for lead and copper ores, the site experienced periods of underground exploration and surface spoil processing before operations eventually ceased. Today, the location is celebrated by mineralogists for its suite of rare secondary minerals that formed through the weathering of primary copper and iron sulfides within the damp mine environment. Among these secondary species, devilline occurs as delicate, pearly-green to sky-blue sprays of thin hexagonal tabular crystals coating matrix fractures and rock surfaces. Collecting at Eaglebrook Mine has provided researchers and enthusiasts with fine representative micro-mount specimens of this calcium copper sulfate mineral, marking the site as an important classic Welsh locality.

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