This may well look like Copper. In fact it also feels like copper. To say it is not copper at all would be a lie, however the fact that this is the same laser cut clear acrylic as in Acrylic Wallpaper adds more credence to this process. It is actually called Electroforming, where the original acrylic was layered in Silver and then electrically coated in Copper. This was then sprayed in an acidic solution which caused it to oxidize and turn green. The most convincing fake I have seen.