Copper is an amazing element. I have long been a collector of coins and that is where the color inspiration was derived from. Looking at Copper in more detail this set touches on Copper in a number of seemingly unrelated ways. The Biology of Copper, in the blood of spiders and the octopus. The chemistry of Copper in the element itself and past alchemist representations of Copper. And finally in history in likely one of the most famous examples in the world of Copper patina in the Statue of Liberty.