S15968 – Copper

This is an extremely well crystallized and pronounced group of cubic crystals to 2.3 cm. This specimen is significant not only for its sharp crystals, but more importantly, for its apparent twin, an awesome aesthetic twin at that. And, its coppery crystals neatly stacked up on top of each other. It is clearly an old-time piece of exceptionally fine Michigan copper. Ex Doug Macdonald collection