SHARP, tetrahexahedral and CUBIC copper crystals with nice patina form this sculptural copper specimen from the famous Copper Country of Michigan. Cubic copper crystals are RARE from the Keweenaw and these are good ones! A CLASSIC, OLD-TIME and very fine piece. Ex L.L. Hubbard Collection #273 and Seaman Museum. His collection, acquired around 1933, is considered one of the keystones to the Seaman Museum.