1999 Georgia State quarter error on different metal

I see a quarter. You should read our FAQs and tutorials before jumping to the conclusion you have any kind of error or special variety. Most likely you should spend it. It might have a few bucks of silver in it if it escaped from a special set, but it's been damaged. That copper clad is not visible really does not mean a lot, as side appearance can vary significantly. We could verify the composition if we see it in person with xray technology.