Copper – Large 7 1/2″ Crystal Formation from Ojibway Mine, Michigan


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This copper specimen is from the Ojibway Mine in Ojibway, Keweenaw County, Michigan, USA. This was an underground copper mine that closed in the early 1900’s. This is an elongated cluster of what looks like cuboctahedral to pseudo-cubic crystals. They have a crude appearance because the surfaces of the prism faces have secondary deposits of small crystals (photo 9). The crystals have sharper habits towards the top as displayed in most photos. The crystals have attached quartz and minor epidote crystals attached. Some of the quartz have inclusions of copper and epidote which can be seen under magnification. It can be displayed from any side.  This piece measures 7 1/2 x 3 1/8 x 2 1/2 inches or 190 x 79 x 64 mm. It weighs over 3 pounds.

Additional information

Weight48 oz

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