Copper Crystals with Silver
Copper crystals with silver from White Pine Mine, Ontonogan Co., Michigan. Small “pin head” showings of silver on interesting copper crystal growth. Specimen measures 70x25x13mm.
|Dimensions||7 × 2.5 × 1.3 cm|
Copper “Skull” from Centennial Mine, Houghton Co., Michigan. Seldom seen formation which occurs when copper is deposited around cobbles in a conglomerate lode. The cobble deteriorates over time and leaves the copper “skull” formation. Specimen size is 135x110x50mm. From Ed Coleman Collection.