An astonishingly good copper by ANY standard, this is also one of unique historical import: according to several people whom I consulted it should be one of the finest surviving early copper country coppers that is well-documented. It is certainly the best known from this old mine. It is a beautiful specimen with a natural old patina, and sharp crystals of several habits accented by calcite. The documentation is ironclad, between the Mine Company presentation label, the old Academy display label, and the labels glued to the specimen. In my mind, this was one of the 5 most important US Classics in the entire Academy collection, especially considering especially how important Michigan's copper country was at the time and the value that economic import lent to preserving specimens of the era. NOTE: NOW BEING DONATED BY BEQUEST TO the SEAMAN MUSEUM In MICHIGAN, WHERE IT REALLY BELONGS, THANKS TO A very GENEROUS DONOR!