Nope, it's steel! Thanks

mele,
Yeah when I first looked it I thought copper and patina by a wash of muratic acid to get the purple tint, but steel hmmm nice color. Nice shape of flower, one thing though that you may try is put a little shaping in the petals so they do not look too flat.
warren
http://www.metalrecipes.com

They actually are crvered you just can't tell in the picture.
Mele

Nelson,
I heat the petals to bend them so they take the patina differently than if you didn't. I clean them and use Insta-rust. It turn the metal a nice pink when you first put it on. Then I seal it after it dries but before it rusts. The sealer turns it a kind of dark copper color. I did let the leaves rust before I sealed them. When you put the sealer over the Insta-rust it always reacts differently and you never know exactly what color it will be.
Thanks, Mele