Are those really tiles?

My house was built in 1863. It had three fireplaces, but unfortunately two were filled in with cement..can you believe that? The mantle was so cool I wanted it to look like a working fireplace. I added the cast iron fireplace door and then it need tile to fill in. So I made my tiles out of sheet rock. I cut them to the size I wanted with a utility knife. Next I peeled off some of the paper( wetting it helped it come off easier) and with the knife I roughed up the edges and made gouges and knicks in the sheet rock. I painted them using a mix of browns and reds and a little green, trying to give each tile it's own look by adding more of one of the colors. I then sprayed the with Glossy Wood Tone spray by Design Master. I use joint compound mix to attach them.