“A lustrous group of micro complex copper crystals contained in a 2.4 mm vug of a crystallized prehnite vein 7-mm wide. The specimen was collected by Tom Rosemeyer on 19 August 2017 at the Avery shaft mine dump, Cliff mine, Keweenaw County, Michigan. The specimen has not been cleaned in any manner except for a breath of air to blow off dust particles from trimming the specimen. ”