Copper crystal type 1 branching growth habit collected at the Tecumseh Copper mine,Keweenaw county,Michigan many many years ago out of the Schuder family mineral collection of over 60 years. It is 1 5/8" x 7/8" x 7/16" and weights 18.1 grams. Collected by Professor Donald L. Schuder of Purdue University in the late 1960's. Buyer pays all shipping by zip or international postal codes and insurance if requested. Thanks for looking and look at our store for other mineral specimens and Copper replacement and included Agates.