Adventure mine, Butler Lode, Greenland, Ontonagon County, Michigan, USA

This is an extremely dramatic specimen resembling a piece of modern sculpture. The Copper crystals pass through the highly modified Butler lode basalt. The basalt has sections of bright green Epidote and red Microcline. At one end, there is a long thin well shaped crystal. This crystal is 2 cm long. At the other end, there is another large crystal which is well formed in the middle but ends with a number of casts. There are also a number of well formed crystals of K-Feldspar which are called Adularia (which is a bit different than the better known European Adularia). The mine it is from is now a tourist attraction with guided tours in the summer.

8 x 4.6 x 4.9 cm

$500      Click here to order this mineral.