Brochantite (VERY rare locality)

Item Description

A very hard to find specimen from the Berkeley Pit near Butte, Montana. This large open pit copper deposit was the final result after it consumed many additional smaller underground mines in the area. It is now closed, but even when it was active, specimens were incredibly difficult to obtain. This is the ONLY piece of Brochantite that we've seen from the locality, and one of the VERY few pieces we've seen period. This specimen hosts, acicular, rich emerald green colored crystals of Brochantite on matrix. The intense blue crystals on the piece look like they could be Linarite, but the species has not been reported from the Berkeley Pit as far as I can tell. The Brochantites look fantastic under magnification. If you collect secondary ore minerals, rare locality specimens or minerals from the western US, don't miss out on this one.
From the worldwide collection of David Burgess (1951-2016). David was a prolific species collector from Newington, Connecticut, and the namesake for the extremely rare cobalt arsenate species Burgessite, which he discovered.