Yes it is! It's copper culture, which is pre-Columbus. I'm not sure I'd try to straighten it. If you do you have to heat it, quench in cold water, bend a tiny bit. Repeat at least 6-10 times, you have to go slow. It might also snap. THAT WILL change the color of it and you won't get the original color back. I'd leave it alone. It's very, very nice.