Copper, Copper District, Keweenaw Peninsula, Michigan, USA, small-cabinet, 6.0 x 3.9 x 3.0 cm, Highlighting this bright dramatic copper specimen is a well formed crystal on matrix reaching 4 cm in length., For sale from The Arkenstone, www.iRocks.com. For more details on this piece and others, visit https://www.irocks.com/minerals/specimen/45368