Copper, Lake Superior Copper District, Michigan Small cabinet 4 x 4.5 x 9 cm $2800. Online 5/27
Deep red/brown, very sharp group of copper crystals branching off copper matrix. A lovely mix of 'bear paw' twinned tetrahexahedrons and highly complex crystals with pristine original patina and totally free of damage. Displays equally well from either side and no evidence of any point of matrix attachment. Dr. David London Collection L-197.