Native Copper In Twinned Calcite, Incredibly Rare Specimen. Keweenaw Peninsula. For Sale

Here I have one of my favorite specimens! This fantastic twinned calcite has small bits of branching copper throughout the calcite. It's not only a unique and one of a kind specimen but is one of the most beautiful specimens I've come across to date. It is a thumbnail specimen in a small display box. I've found somewhat similar specimens for sale upwards of 1000 dollars and nowhere near as fantastic as this one I have here. Hope you enjoy it as much as I do! Collected from the Keweenaw Peninsula Michigan in the 60's.