Emrit, I stole a slate tile fireplace for your room. Actually, the original photo was a bit too gray, so I warmed it up a bit. You'll have to get tile samples and bring them into your room to see how they look in your light.

I met with a customer to discuss wrapping the sides and facing her fireplace with stone or tile. She would like to stick with white as that is a part of her theme. A suggestion on what type, size and colour of mantle would also be helpful. Thanks!

If it's this? It looks like MARBLE. What have you got?

What is the style of your furniture and surrounding decor? with low ceilings I would make Entire fireplace Wall up to ceiling very simple smooth large Neutral or white marble tiles.... no stone.....hang a gorgeous mirror over it to reflect light into the room...No mantle you will have area in the bookcase to place some pretty Acessories ..remove some shelves before painting so you can patch what is needed. I would only have 2 shelves...paint it all a neutral Or white to match fireplace tiles...