Thats pretty cool. My LFS has a small peice (about a quarter of the size of the one pictured) and it has a terribly drab green color. They are selling it for like 29$, which is probably because of its boring color. I had heard that they will change color but never actually saw it, but now that i have i might just get the piece and give it a shot. Worst case is it stays dull green, but it still only cost 29$.