David K. Joyce


Largest piece 5.0x3.8x2.0 cm
Keweenaw Peninsula

Michigan, USA


Item number: 25032

OK, these are not copper, persay, but they do come from the most famous native copper mining area in the world. The two halves make a complete datolite nodule coloured reddish by inclusions of cuprite or possibly hematite. These nodules occur in the copper deposits and are interesting as well as beautiful!