They don't need to match, but I would coordinate the styles. Right now, it looks like you have one quite rustic, and one quite traditional.

I don't think it's necessary to remodel the fireplace. Perhaps you can achieve the style you want with simply paint and accessories.

Thanks for your input. I’ve been trying to make it work with accessories, but the green is such a prominent color it’s been difficult. I’d like to get rid of it.

too much clutter, for me.

I would remove all the decor, paint the wooden surround and the wall the same color, leave the stone as is and edit the decor to something simple (a statement piece to highlight)

your decor in the room appears to be very traditional. Would you consider painting the jut out of the fireplace and the surround a dark color to blend with the surround and hearth so it doesn't stand out... I'd replace the mirror with a framed picture the sconces are enough with out any added decor. someting simple and rustic on the stone fireplace.

I definitely don’t like the sconces. They’re too big and I was either going to get rid of them completely or replace them.

The replacement sconces are required to have the cover plate at the bottom of the fixture since the boxes are so very low.

Thank you!

IMO they need to match and the one with the green hearth is IMO a much nicer look than the very rustic one but we have no idea of your style, the rooms nothing except two pics of 2 FPs that do not belong in the same house .Post the pics here in comment sDO NOT strat another post I have no idea how anyone can answer this with zero context

Wow, those are very different FP styles! Which style goes best with architecture and permanent fixtures (not your personal furniture)? If rustic, replace formal colonial mantel with thick rustic wooden mantel beam, no surround, stone veneer to protect floor, chain link curtain over firebox. They should relate but not match

The heaviness and monotone color of the rustic FP calls out for a colorful casually-framed art, not one that blends in. No smaller than the one you have now. No decor on mantel bc so much is visually going on with the stone and contrasting dark mortar.

What do you dislike about the formal Colonial FP? The marble? The marble color? The dentil molding? The thin mantel? Does it feel too formal for the overall house architecture and permanent fixtures (not your furniture)? Wile you decide, make some small changes: remove all the mantel decor, hide the gas FP wall switch with a tall plant, on the tables flanking the FP try making groupings of 3 items and vary the heights and textures to enhance your vignette proportions.

The dark green marble makes a huge statement in the room and everything has to coordinate with it. The mantel is okay. I don’t hate it but I don’t love it either.

Whatever you do, do not burn wood in there and smoke up your neighbors yards and make them mad. Put in a gas or electric insert in each of them. Burning wood (or anything else) in fire pits or fireplaces is rude - neighbors cannot walk from their homes to cars without getting big whiffs of toxins.

They’re already gas fireplaces

I agree w Beverly. Paint the white. Lose the mirror. Switch up accessories and scones. What about replacing the throw rug(1st pic)? It doesn't look like it does much to accent the fireplace.

How about both of them painted dark charcoal and no decor? Only a matched set of artworks, one over each mantel. Also paint the bumpout charcoal on the non-rock fireplace...floor-to-ceiling like the opposite one.

Dark recedes-- and the art paintings will pop and draw the eye as the focal point away from the discrepancy in the fireplace materials.

If you don't like the green, by all means, get rid of it. A white hearth would look great, an a white tile for the surround would really make it less of an eyesore. You don't have to make the fireplaces match completely, but they should complement each other.

With two different styles, one of the best ways to do this would be with making them the same color, and same texture. Consider covering the rock fireplace with a white stucco, making it as smooth as possible. Keep the black fire screen on both fireplaces. See if you can make the mantle on the stone fireplace a little more shallow, it's kind of overbearing.

As for decorating it afterwards, go with a minimalist fashion. First, remove the mirror above the traditional style FP as it doesn't add anything to the design. It's too small and not the right shape. If you are going to put a mirror above a fireplace, it should be the same width and shape and design as the FP. Always look at what the mirror is going to REFLECT before you put one up. You probably don't want it to reflect a guest bathroom or a laundry room, or a blank wall. Next, remove the sconces, they don't add anything either, and it just makes everything look cluttered. The sconces are Art Deco style and your FP is traditional style.

If you want to put items on the mantles, make sure they echo each other. If you put tall, narrow black candlesticks on one mantle, put up the same ones or similar style ones of the same color on the other. Maybe you can find some black metal canisters to store FP accessories like long matches, a stick lighter and some little firestarters. I wouldn't put family photos on the mantle, it does get hot when you have a fire going. Instead of framed art above the mantle, consider putting up a unique metal art piece, or a series of metal art pieces that stretch across the FP. If you remove the sconces, look into taking the electric wires up to the top or near the top of the FP and put up a single "Art Light" that puts light directly on any piece of art you put up on/above the mantle.

Good luck with your improvements, and remember the most important thing--it has to be what YOU like! YOU will be looking at this every day, make your design joyful and your days will be joyful. If you don't like something, don't keep it--get rid of it. There's no reason to keep something that doesn't appeal to you or doesn't bring you joy.

Thank you, that was very helpful.

Beautiful. Curious if you know the name of the paint color of the beige walls? I painted my formally white fireplace beige for that modern / warm feel + boy was it hard to find a color.

Picking colors is awful, which is why most people go with the most popular because they know they work. The color I picked is Perfect Greige by Sherwin Williams.

I ended up going with Pavillion Beige by SW. The space only gets Northern Light so I'm still working on lighting + know it will be a process. Sue Johnson's tips were golden. I may send her a pic of mine to style away:) Although it took me a minute to understand the tips re: the mirror but I think I finally get it. I've loved that shape mirror since I first saw it (on House of Valentina) but I too have yet to spot the perfect wall in my home for it. So, I get it... A trend I have yet to jump on. The blackish (Iron Ore like) fireplace by Lynn Nielson is my hands down fave as far as styling, colors, mixed textures, ect :)