Ask Brett Waterman from the 'Restored' TV show. He has the experience, he should know.

https://www.diynetwork.com/profiles/talent/brett-waterman/brett-waterman-bio

Are you referring to the stone surround and mantel or the actual firebox and chimney? If the stonework was original, I would expect to see it stained from burning wood.

I love the look of the stonework, but the fireplace screen does not flatter it.

I don't think so but I agree ask Brett. Notice the tile on the floor -- it doesn't really go with that beige brick/stone fireplace. And to me it doesn't have enough age -- it's almost 100 years old -- it should look it!

The tile looks right. Not sure about the surround.

You mention that the color is not original. Do you know if the fireplace was repainted? It looks like someone put a faux finish on it. I think that is what is throwing if off from looking original.

Hansen - I agree I don't like the screen either but it was a temporary fix to stop the cat from going up the chimney LOL

I do know the firebox and hearth tile are original I am referring to the stone surround - it has been badly faux finished (painted the horrid orange color) We are getting ready to do a whole house remodel but want to keep as many features as we can so are just wondering about the actual surround if it is original or not (we will need to re-paint/re-finish to get rid of the orange paint) and I know it hasn't been used in many, many years

Thank you everyone for your help - let me know if you have any more thoughts

What region are you in? Some of these styles can be very localized. If you're planning to redo it or fix it up anyway, why not chip a chunk off and see if you can tell how deep it goes?

(The screen isn't THAT bad. Cats. hehe.)