Colusite (rare locality specimen) (ex David Burgess Collection)

Item Description

Colusite is an uncommon Cu-V-As-Sn-Sb sulfosalt, and the type locality for the species is the East Colusa Mine in Butte, Montana. This piece is labeled as coming from the Anaconda Vein (Anaconda (Mine), featuring sparkling microcrystalline Colusite with brilliant silvery-metallic luster on the bronzy crystals. There is an unknown soft blue colored mineral on the piece, and if there are any people who are familiar with Butte material, we'd appreciate it if you would reach out and let us know what this could be. We have photographed the piece with a Canon MP-E 65 mm macro lens to better illustrate the quality. 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. The piece comes with a label from noted rarities dealer, Josef Vajdak, which states the piece was collected in the early 1900s.