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Copper with Calcite, Lake Superior Copper District, attr: Pewabic Lode, Quincy Mine, Houghton County, Michigan small cabinet 3 x 5 x 9 cm $350. Online May 8 SOLD


  • $ 35000

Group of deep chocolate brown copper crystals with associated gemmy calcite crystals with inclusions of copper. Largest copper crystal to 3.5 cm across . Specimen has a small amount of purplish basalt matrix classic to the Pewabic Lode. Original rich patina: specimen has never been acid cleaned. David Strong Collection. No faults.