Copper, Lake Superior Copper District, Michigan, Phoenix Mine attr., Keweenaw County attr., ex. William A. N. Severance Collection 99.56, Small Cabinet 3.0 x 4.0 x 8.5 cm. $4500. Online March 3.
Lustrous snake like group of tenorite and cuprite coated copper crystals with associated vein breccia on base. Displays well from multiple orientations and in top condition. Note: Catalog number 15-380 may indicate Cranbrook Institute of Science as previous collection. Mined circa late 19th century.