Hi rmcameron,
Thank you for posting in the Apple Support Communities. It sounds like you'd like to save a separate original copy of a photo that does not include edits, correct? If so, the edit tools would allow you to revert the photo back to the original, but this doesn't save a copy of the edited photo. For a separate copy of the photo, if saved from a different source, it may be best to save the photo twice so you'll have both versions. You can also capture a screenshot of the photo to have a save an additional copy as well. We've provided links below to help.
Edit photos and videos on iPad
Take a screenshot on your iPad
Let us know if you need additional help with your photos. We're always happy to help.
Cheers!