Pretty fireplace design. I like it a lot. To maintain integrity of look and design I would face a gray quartz right unto the gray wall. You can get one continuous slab in 10' goods now from various makers. You will have to check on material to see gray colors and if you like it. Hire GREAT fabricator who will carefully cut solid piece to fit. Interview fabricators thoroughly too. Look at Sile Stone, Cesar Stone etc....Also Bedrosian's has NEW quartz material in 10' slabs too. I would exhaust this strategy first before trying other ideas but, fireplace surrounds need material that is stable and resists conducting heat.

Not sure of your style, but I like a stacked stone look. You can choose thicker stone for a more traditional look or go with thin similar pieces for a more modern clean feel. Also there are plenty of color variations that you can utilize as well.

Hi, Patty-- You've got a lot of great stuff happening in this room already! And to my eye, your taste is more refined than stacked stone, which may not align with your rich palette, 6-over-6 windows, and elegant molding. I'd keep the drywall and color that you've got which tie into your current tones so well, and think about two other options for this focal point: Wall sconces While you've got the overhead pinspots to draw attention to your artwork so you're painting with light already, I'd explore adding a linear sconce pair to frame your key art (with dimmer control) that could add a bit of atmo light. Fireplace surround The other idea I'd consider is updating your fireplace surround material here either breaking it up into a pattern with more detail, or a solid-state material that's lighter in tone. It may be the picture you shared, but it's sort of just a dark, unrelieved mass that could be a bit better integrated into the overall plan you've developed with rich textures and warm, elegant colors. Also, I might consider raising your current artwork just a few inches so you have the same space above and below the frame rails. It really fills the verticality of the wall plane, so you want it to have balanced breathing room above and below. Cheers!

Love your modern fireplace. That’s interesting that you can have things so close to it! It’s hard to tell from the rendering whether you’re going for a more modern or traditional look (coffered ceiling is throwing me off). With that fireplace, I’d go for a sleek finish (stone or quartz slab). Stacked stone or shiplap don’t see to go with that style in my mind. My neighbors installed a metal surround that works well with a modern or industrial style. I saw a similar one that Studio McGee did.