A fine, old-time copper-in-calcite specimen from the historic Quincy Mine of Michigan's Copper Country. The beautifully upright, 2.7 cm, doubly terminated, very glassy and well-striated crystal rests in front of a larger, diagonal, doubly terminated, 3.5 cm crystal. The calcite crystals are pristine and are richly filled with bright copper crystals. Ex. Marty Lewadny Collection.