Without seeing a picture of what your fireplace looks like now, it is hard to give you suggestions on how you might improve its looks.
Please post a picture so that we can see what you are starting with.
Bricks, Slate, Facing stone, Aluminium, Steel, marble, Faux Stone boards,. Make sure that the product is fire proof before adding it to what might be an open fire area.
Carol: maybe this will help
Hello, Fireplaces can be painted or often retiled and I find looking around at the visuals on Pinterest or Houzz might offer some inspiration and ideas.
Heres some ideas that I saved