What’s there now, just plywood or? I would just go to a tile/stone store & pick up samples. Since you can’t match surround, probably something neutral.

Off the subject but something that caught my eye. I would consider having that area above your fireplace drywalled over to square it off & get rid of that tight corner. You could

then do art or whatever above your mantle , that mirror looks squished in.

Yes, its just plywood.

Agree with K Laurence…neutral tile.

Here are some samples we picked up. Details will be appreciated

Really hard to tell on a monitor but at first glance I think I like the one on the left in first photo. But color on monitors are tricky, any close up shots?

Does thta FP function , is it wood burning or gas ?

Gas

Based on your pix, which can be deceiving, the Poetry Stone appears to blend best with the existing tile.

Thank you! We really liked the 2 brown-ish skinny tiles also. Would they look out of place? Otherwise, neutral is what we’ ll go with

We don’t.

I don't think the 2 brown-ish tiles you like would look nice.....the color is too jarring with the busy floor and tile surround. Honestly, I'm not feeling any of the tiles you show. A very plain neutral would look best I think.

I agree that the small flat piece in the corner makes the fireplace look odd. If you aren't able to square it out, I would remove the slim mirror (it emphasizes the small flat piece) and use two coordinating pieces of art on each side of the small flat piece instead. You could also purchase a larger piece of art and just lay it on top of your hearth - it would cover the slim flat piece.

I would get a slab to replace the hearth. A piece of charcoal gray slate or a honed black granite would look better than trying to find another tile to work with your current tile. If you go to a stone fabricator (countertop fabricator), they have MANY pieces of stone remnants that aren't really worth much to them. You can sometimes just pay for them to fabricate the piece to fit (my sister did that for about $100).

Below is an example of the color of slate that my sister used:

There are other cost effective ways to update your entire fireplace surround (it looks dated with the 12 x 12 tiles that builders used to use). Here are a few easy (DIY) ideas:

The below green marble was covered with peel and stick stone tiles - they used mother of pearl tiles but there are other stone options. If you purchase the ones that are set close together, you won't even need to grout it afterwards. You can use the same tile for your hearth.

The fireplace below was updated with marble herringbone mosaic tile. You can tile over tile on a fireplace. You need to use Mapei Eco Prim Grip over the tiles (let dry) prior to installing the new tile.

You can use more stick and peel tiles (Amazon has marble ones) or you can purchase mosaic sheets and use rolls of sheet adhesive (no mess) OR tile adhesive that is pre-made in a bucket (mastic - don't ever use this in a shower or bath surround or when installing floor tile). You can also use regular mortar that you mix from a powder (a bit messy - but the least expensive to purchase).

You can also use Ardex (Or Henry's) feather finish over your tiles to create a cement surround. There is regular gray feather finish - or you can purchase white feather finish. Also, you can add pigmented powder to it if you'd like a different color.

Before:

After:

He also painted his mantel in order to update the look of his fireplace prior to adding the feather finish.

Below is another example of using tile over existing tile. She used regular marble mosaic tile sheets + pre-made mortar to install the tile.

The person below did a faux lime wash using a few different color paints to create the effect. The first step was using a primer on the tile.

Below is an example where someone installed brick looking tile over an existing surround that was previously painted white.

You can also use microcement to create a stone slab look over your tile surround: