The porosity of the tiles doesn't matter - the waterproofing happens on the layer below. You'll want to use something like Kerdi (the Kerdi shower pan kit is nice) or a similar product, or RedGuard, or another form of waterproofing.

The problem with marble is that it's a limestone type of stone, and susceptible to chemical attack. Over time it will lose it's gloss and go dull. How long this takes will depend greatly on your water and the products you use. It might only last a few years or it might outlast you. When it dulls you can either polish or replace.

JohnBridge.com is a tile forum, and the topic of marble showers has been discussed there. You might get some good info by browsing old topics. And John Bridge himself has a marble floor in his shower and wrote an article about it. He lists a recommended sealer and has some brief instructions on using it, too.

Answer from Sean on Stack Exchange
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Artistic Tile
artistictile.com › collections › marble-tile-shower
Marble Tile Shower: Elevate Your Bathroom's Floors & Walls – Artistic Tile
From the shower walls to the shower floor, using Carrara white marble can achieve timeless elegance that unifies the marble walls, marble floors, and floor tiles in the same color palette. A marble tile shower also benefits from a refined shower surround featuring either honed marble or polished marble finishes that highlight the beauty of this beautiful stone.
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Pinterest
pinterest.com › kfrancini › marble-showers
140 Best Marble showers ideas
Thassos Marble Shower · Shower Valve Height In Inches · Small Bathroom Tile Ideas · Small Bathroom Tiles · Modern Small Bathrooms · Душевая Кабина · Master Shower · Carrara Marble Bathroom Design · Carrara Marble Bathroom Ideas · White Carrera Marble Bathroom ·
People also ask

What are the benefits of using marble tiles in a shower?
Whether seeking master shower tile ideas or looking to update a guest bath space, marble is a timeless, elegant, and durable choice that will increase the value of your home.
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apollotile.com
apollotile.com › home › blogs › our blogs › inspiring shower wall tile ideas with marble elegance
Inspiring Shower Wall Tile Ideas with Marble Elegance – Apollo Tile
What types of marble are best for shower wall tiles?
Glossy marble tile designs have a light-reflecting quality that makes bathrooms look brighter, spacious, and airy. Opt for white tiles to enhance this effect even more.
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apollotile.com
apollotile.com › home › blogs › our blogs › inspiring shower wall tile ideas with marble elegance
Inspiring Shower Wall Tile Ideas with Marble Elegance – Apollo Tile
How can I prevent my marble shower tiles from staining?
Sealing the tiles during installation and twice every year adds a protective barrier against stains.
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apollotile.com
apollotile.com › home › blogs › our blogs › inspiring shower wall tile ideas with marble elegance
Inspiring Shower Wall Tile Ideas with Marble Elegance – Apollo Tile
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Houzz
houzz.com › bath photos › bathroom › wall tile material: marble › shower type: curbless
75 Marble Tile Walk-In Shower Ideas You'll Love - November, 2025 | Houzz
Walk-in shower with Avenza honed marble tile. Bathroom - mid-sized modern master gray tile and marble tile marble floor and gray floor bathroom idea in Orlando with gray walls
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Cornerstone
cornerstone.house › home › bathrooms › 10 marble shower ideas: elevate your bathroom with timeless luxury
10 Marble Shower Ideas: Elevate Your Bathroom with Timeless Luxury
April 30, 2025 - Experience the allure of continuity as the same elegant marble adorns both the shower walls and the entire bathroom space, flowing seamlessly from the shower to the sink and mirror. Enveloped in this cohesive design, the soothing ambiance is further enhanced by subtle green LED lighting, creating a harmonious and visually striking retreat. ... In the marble-dressed primary bathroom of this Brentwood residence, a bespoke marble tub becomes a striking sculptural focal point, exuding elegance. The tranquil setting is complemented by a vanity stool and bespoke herringbone tile flooring crafted from exquisite Nero Marquina marble, enhancing the space’s serene charm.
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Backsplash
backsplash.com › marble-tile-shower-bring-a-sense-of-luxury-with-marble-tiles
Marble Tile Shower Bring a Sense of Luxury with Marble Tiles
October 23, 2025 - A splash of marble in the bathroom is the way to go if you want a trendy new appearance that’s right on style. To go one step further you can try out the marble herringbone tile shower and be amazed by its view! Herringbone tile is making a reappearance as one of the trendiest bathroom design ideas.
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Maison de Pax
maisondepax.com › home › marble tile combinations for bathrooms
Marble Tile Combinations for Bathrooms - Maison de Pax
March 27, 2025 - honed 6×12″ carrara marble wall tiles with 2″ tumbled marble hex shower floors · It’s no secret that I’m a fan of marble bathrooms. In fact, I’ve used marble tile in almost every single one of my bathroom remodels since this blog began, and I’ve got loads of marble bathroom ideas for you.
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Tile Club
tileclub.com › blogs › news › white-marble-shower-floor-tiles
Should you Use White Marble Tiles in your Shower?
White marble homes are having a renaissance - given their popularity since ancient Greece and Rome, you can make the argument that they’ve never gone out of style! These days, airy white interiors are still taking center stage when it comes to home improvements and new build trends, and white marble remains the must-have for adding a feel of luxury - from a glamorous Calacatta Gold backsplash to a luminous white marble shower!
Find elsewhere
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The Tile Shop
tileshop.com › home › 14 marvelous marble tile bathroom ideas
14 Marvelous Marble Tile Bathroom Ideas - The Tile Shop Blog
September 13, 2024 - The leaf-shaped Elia Polished by Alison Victoria tile, shown here, creates an elegant moment in this chic shower. Featuring: Elia Polished by Alison Victoria, Brick x Brick by Alison Victoria Petal and Alison Victoria Precious Metals Rose. Love marble, but floor-to-ceiling application doesn’t fit in your budget?
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Apollo Tile
apollotile.com › home › blogs › our blogs › inspiring shower wall tile ideas with marble elegance
Inspiring Shower Wall Tile Ideas with Marble Elegance – Apollo Tile
April 25, 2024 - Dainty mosaics in hexagon, penny-round, basketweave, or herringbone are great for creating an intricate visual and introducing textural dimension. Large shower tile ideas infuse a seamless appearance and a spacious feel.
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Driven by Decor
drivenbydecor.com › home › marble tile in a bathroom: would i do it again?!
Marble Tile in a Bathroom: Would I Do It Again?! - Driven by Decor
August 6, 2025 - Choosing marble tile for this accent wall was a no-brainer – it’s in a spot where the worst of what could get on it is a splash or two of water and it sets the tone for the entire space. Area #2 was in our shower – EVERYTHING is marble tile from the shower floor to the walls to the accent in the niche and even the curb area (I used {this 3″ x 12″ Bianco Bello tile} for the shower walls & {this Bianco Bello 2″ hexagon tile} for the floor and niche):
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Apollo Tile
apollotile.com › home › blogs › our blogs › 25 stunning marble bathroom tile ideas
25 Luxurious Marble Bathroom Tile Ideas for Your Dream Retreat – Apollo Tile
October 23, 2024 - The latter will emphasize the shape and layout of your marble bathroom tile. Marble bathroom ideas for a small space include tiling the backsplash, shower walls and floors, shower niches, tub surround, or the entire walls of the room.
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Decorilla
decorilla.com › home › 8 best marble bathroom ideas for a polished look
8 Best Marble Bathroom Ideas for a Polished Look - Decorilla Online Interior Design
May 6, 2022 - Whereas, some have a single all over color others display unique veining patterns that make a statement. These marble bathroom ideas also allow you to convey a lot of visual interest. Dark marble shower ...
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Stone Tile Depot
stonetiledepot.com › tile › marble-tiles › marble-tile-shower
Marble Shower Tiles | Marble Tiles | Stone Tile Depot
Finally, if you are constructing a bathroom and have a low budget, then marble tiles in the Shower can seem a good option. These tiles are available in attractive designs and are comparatively cheaper than other bathroom alternatives.
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The Spruce
thespruce.com › bathrooms-with-marble-tile-4138312
20 Gorgeous Marble Bathrooms That Will Fill You With Envy
February 15, 2022 - The pink brick wall inside the shower adds a dose of playful color, allowing the space to feel fresh and modern. ... This classic primary bathroom with floor and wall marble tile proves that bigger can be better. The larger tile size provides some interesting flow and movement to the space, and the white freestanding bathtub with black accents ties together the polished look. ... If you love the idea of dark marble but don't want to go overboard, try implementing it in smaller ways.
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Soul & Lane
soulandlane.com › home › bathroom › 23 marble shower ideas for a luxury bathroom oasis
23 Marble Shower Ideas For a Luxury Bathroom Oasis
November 25, 2023 - Towel hooks are included within the shower to allow for easy access to dying before exiting the shower. ... A beaded chandelier hangs over a freestanding bathtub beside a marble tile shower with a grand glass panel casing and mosaic stone tile floors. A herringbone marble floor tile is used throughout the space for a modern and luxurious high-end finish. ... Shower room ideas shine through in this bathroom with a contemporary shower room with a glass half wall, cool gray marble tiles, and contrasting black fixtures.
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Houzz
houzz.com › discussions › 5862960 › marble-shower-if-you-had-to-do-it-over-would-you-do-it-again
Marble Shower: If you had to do it over, would you do it again?
I have fallen in love with Biltmore Amalfi subway and Biltmore Niles mosaic tile. I looked at porcelain look-alike tile, but nothing really compares to real marble aesthetically. My concerns are the porous nature of marble and staining and the softness of the marble and breakage.
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Floor & Decor
flooranddecor.com › blogs › marble-bathroom-ideas.html
Top 10 Marble Bathroom Ideas for Your Home | Floor & Decor Blog
October 19, 2025 - Marble mosaic tiles, like hexagons or chevrons, offer visual interest without overpowering the space. Pair white or light gray marble with matte black fixtures for a trendy, minimalist effect.