Chalcopyrite with Dolomite

specimen number:
2063832

location:
Brushy Creek Mine, Reynolds Co., Missouri, USA

description:
Attractive golden lustrous crystals of chalcopyrite measuring to 0.9 cm in size coming off the top of a breccia matrix that is coated by small white crystals of dolomite. This is in very good condition. Collected by Brian Huntsman in 1995.

The Brushy Creek Mine, brought into full operation by St. Joe Minerals in November 1973 within Reynolds County, Missouri, is a key industrial underground facility situated in the central part of the world-class Viburnum Trend. Geologically, the deposit belongs to the Mississippi Valley-type family, featuring sulfide mineralization hosted chiefly within the Cambrian Bonneterre Dolomite and overlying buried Proterozoic paleotopographic basement knobs. The mine is celebrated both for its large-scale commercial extraction of lead, zinc, and copper, and for producing exceptional mineral specimens—particularly scalenohedral calcites and iridescent marcasites—recovered from deep underground watercourse cavities.

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