Dims: 2.22x1.49x0.89" (5.63x3.79x2.27cm)
Wt: 2.51oz (70.9g)
Osceola Mine, Fagottiville, Michigan, USA
This is a native copper specimen from the Upper Pennisula of Michigan. It is primarily copper, with about 20% of its surface covered by the remaining host rock, an impure limestone. The copper shows no indications of crystal form. The surface texture is unusual, in that it is very rough and pitted on a fine scale, yet there is a suprising amount of luster. Indeed, much of the surface is irridescent in hues of gold, orange, and red.