Wait, must be natural gas in your neck of the woods. Or do they let you burn wood with an indoors fireplace?
Wood is completely kosher. My fireplace was built in 1925 and while a lot of folks confuse it for a Batchelder tile fireplace, it's actually from a competitor that was called Claycraft that exist in the 20's and 30's here in LA. The three little mural tiles are worth about $200-6000 a piece. (You can see one vertical on the right hand side)
Welcome to Southern California where in the 20's-40's, there was a really strong style movement for these hand crafted tile fireplaces with hand painted mural blocks. Move into the 50's and the crimes happened where folks would just paint over it with white paint.
These days original tiles are so coveted that tile shops around SoCal will come in and for free - pull the tiles, clean up the mess and build you a new surround - just so they can get the tiles. Sometimes you have unknowing owners and flippers who buy a place with an original Batchelder or Claycraft fireplace and they destroy the tiles when they remove the fireplace. Crying shame. (Interestingly, Batchelder was Cal Tech's Pottery instructor. I live about ~12 blocks from Cal Tech)
Here's the fireplace
It has a really short firebox, so it reflects a lot of heat back into the room. And yes, that is a fat chihuahua roasting his belly.