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Walter R. Kellogg


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Mineral Specimen #3876    Copper, Calcite with Included Copper

Quincy Mine, Houghton Co., Michigan

There are two very nice clear Calcite crystals with brightly colored included Copper; however, they are tucked into a recessed area and are difficult to display. The Copper on the rest of the specimen has a very dark, almost black, patina. This Copper is a mass of highly modified, thin, elongated spinel twin crystals with thin flanges. These Copper crystals are in a generally parallel orientation and are in places curved. There is also another cleaved Calcite crystal on the top of the specimen. The specimen is in fairly good condition 

From the George Katzmarek collection

9.7 x 9.3 x 5.8 cm


This mineral is also found in the following galleries: Minerals From Michigan | Copper | Calcite | Minerals Priced Between 100 and 199 Dollars