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Walter R. Kellogg


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Mineral Specimen #6896    Silver, Copper

Caledonia Mine, Ontonagon Co., Michigan

3.5 x 3.2 x 1.8 cm
1.4 x 1.3 x 0.7 in


The majority of this specimen is composed of native Silver. The Silver has a rough texture and exhibits some crystallization. There is also a small amount of native Copper present. The green color is a combination of Copper alterations and likely Epidote.

Condition: Very Good

Flaws: There is no appreciable damage to the specimen. However, it should be mentioned, it is highly likely the specimen has been dipped in a matte, clear, non-yellowing lacquer to prevent tarnishing. This was a common practice employed by the past owner and likely has also intensified the green colors.

This mineral is also found in the following galleries: Minerals From Michigan | Gold and Silver | Copper | Minerals Priced Between 50 and 99 Dollars