Mineral: Copper on Prehnite
Locality: Adventure Mine, Greenland, Greenland Township, Ontonagon County, Michigan, USA
Dimensions: 66 x 40 x 39 mm

Description: Lustrous, lime-green Prehnite crystals to 2 mm cover a basalt matrix. Copper as thin wires and small leafs are perched on and intergrown with Prehnite. Specimens of Copper and Prehnite are not common, and this is a fine example. No damage.

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