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Mineral Specimen #6721    Gerhardtite, Calcite

Nebraska Mine, Greenland, Ontonagon County, Michigan, USA

3.9 x 3.3 x 1.9 cm
1.5 x 1.3 x 0.7 in


Ex. Rich Whiteman


The Gerhardite is the light blue colored material. Also present is white colored Calcite with some cleavage planes showing. Please note: on mindat, Gerhardtite is not listed for the Nebraska mine but is for the Caledonia mine. However, the entrance to the two mines is only a few hundred meters from each other and the two are connected underground. The specimen was purchased from Rich Whiteman, the former owner of both mines.

Condition: Composed of massive material.

Flaws: Essentially massive material.

This mineral is also found in the following galleries: Minerals From Michigan | Carbonates | Rare Minerals | Minerals Priced Between 25 and 49 Dollars