Incredible native copper/Silver "Skull" Keweenaw Peninsula, Michigan For Sale

This is a real rarity. A skull specimen refers to how the copper formed around another mineral leaving an empty space or "skull"  feature. Besides that, it's large size, hefty weight and the uppermost portion is wrapped in silver! Another unique feature is a couple small pyrimid or tetrahedral crystals on the back side that are extremely sharp and well defined make this a really unique and gorgeous specimen.

Height- 4½ inches

Length-3 inches

Width-2½-3 inches