Prints to Tile or Slate

This winter I tried something I read about on the internet, but do not
remember where. It was on taking a print and using Modge Podge to adhere
it to a piece of tile. I tried it to all three, a piece of slate, tile and
rock. I like the piece of slate the best. (see my photo). For the slate image,
I used a lighter to burn the edges of the print. The rock image may have been better with a less busy image. Has anyone else ever tried this?