Polar Thassos White 18x36 Honed Marble Tile - TILE & MOSAIC DEPOT

Polar Thassos White 18x36 Polished Marble Tile

PWM18X36P0181

SAMPLES SHIP FREE WITHIN 1–3 BUSINESS DAYS

$15.95 / sq. ft.

$71.78 / Piece

QUANTITY

SOLD BY: sq ft Minimum: 50 sq. ft.

Sq. Ft.

pieces

Minimum order: 50 sq. ft.

Add 10% more to cover cuts and waste (recommended)

TOTAL PRICE:

—

Order your full amount plus 10% at once — reorders may vary in tone and veining. Shipping damage is covered with photos; small shortages (1–5 pieces) are refunded, NOT reshipped, so the extra 10% protects you.

Polar Thassos White Marble

Polar Thassos White Marble — the purest, most brilliant white marble available. Crystalline white with virtually no veining in tile and mosaic formats. The definitive choice for luxury bathrooms, spa spaces, and high-end kitchen applications. Free sample shipping.

About Polar Thassos White Polished Marble Tile

Material Education

Thassos White is a pure white crystalline marble quarried exclusively from the island of Thassos in the Aegean Sea, celebrated as one of the whitest natural stones in the world. Its dense, sugar-crystal structure produces an almost luminous brightness with minimal veining, setting it apart from all other white marbles. A high-polish finish amplifies its natural sheen, giving surfaces a mirror-like reflectivity that catches and amplifies light beautifully.

As a product of nature, individual tiles may exhibit subtle variation in crystal density, very faint clouding, or barely perceptible tonal shifts — these are hallmarks of genuine Thassos marble and contribute to its unique, living character.

About this tile: This large-format 18×36 polished field tile delivers dramatic, uninterrupted expanses of brilliant white stone, ideal for floors and walls where a seamless, high-impact look is the goal. The generous slab-like proportions minimize grout lines, creating a near-continuous stone surface with a luxurious, gallery-quality appearance.

Design & Inspiration

Thassos White's pure, snow-bright palette pairs effortlessly with polished chrome and brushed nickel fixtures, warm white oak cabinetry, soft greige wall paint, and bold contrasting stones like Nero Marquina black marble or Calacatta Gold. It suits a wide spectrum of design aesthetics, from minimalist contemporary and Scandinavian spa to classic European luxury and transitional interiors.

The large 18×36 format is especially powerful in master bathrooms and open living spaces, where the oversized tiles create a sense of expansive, unbroken space and visual calm. Laid in a staggered brick pattern or straight set, the polished surface reflects both natural and artificial light, making even modest-sized rooms feel dramatically larger and more open.

Popular design combinations: pair Polar Thassos White 18×36 floor tiles with a Thassos 1×2 herringbone mosaic accent wall and matte black fixtures for a striking monochromatic spa bathroom. Explore the full Thassos White collection for coordinating sizes, and browse more marble tile for complementary looks.

Ships in 2–3 Days

Free Sample Shipping

Nationwide Delivery

Premium Natural Stone

Secure Packaging

Polar Thassos White is sourced from the legendary marble quarries of Thassos Island in the Aegean, producing one of the purest, most brilliantly white natural stones available anywhere in the world. Its dense crystalline structure and near-total absence of veining give it an extraordinary, luminous whiteness that no engineered stone or porcelain can authentically replicate.

Each tile is cut to an expansive 18×36 inch format and brought to a high-gloss polish that enhances the stone's natural reflectivity and crystal sparkle. The large format dramatically reduces visible grout joints, creating an almost seamless stone surface that adds a sense of luxury and spatial depth to any floor or wall installation.

Ideal for master bathroom floors, shower surrounds, spa feature walls, and upscale residential or hospitality lobbies, this tile performs beautifully in any interior application where maximum visual impact is desired. Because clearance inventory is limited at this size, ordering a sample is strongly recommended to confirm color match, and purchasing 10–15% overage is advised to account for cuts and future repairs.

Material	Natural Marble
Color	Bright White with Subtle Crystal Variation
Type	Field Tile
Tile Size	18 × 36 inches
Finish	Polished
Sold By	Per Sq. Ft.
Application	Floor & Wall (Indoor)
Shade Variation	V2 — Slight Variation
Design	Contemporary / Transitional / Luxury
Country of Origin	Europe

✓ Master Bathroom FloorExpansive format creates seamless, spa-like luxury

✓ Shower Surround & WallsPolished surface brightens and visually enlarges showers

✓ Feature Wall / Accent WallLarge slabs deliver bold, gallery-quality stone impact

✓ Foyer & Entryway FloorLuminous white makes a striking first impression

— Outdoor UsePolished marble is not recommended for exterior applications

— Commercial Wet Floors (Unsealed)Requires sealing and non-slip mat in high-traffic wet areas

Free Shipping: This product ships at standard freight rates calculated at checkout based on your location and order size.

Processing & Delivery: Orders are processed within 2–3 business days. Large orders ship via LTL freight — curbside delivery only. An adult must be present to sign for delivery. Estimated transit: 2–10 business days after shipment.

30-Day Returns: Uninstalled tile may be returned within 30 days of delivery. Inspect all tile carefully before installation — installed tile cannot be returned or exchanged. Samples are final sale.

Exclusions: Free shipping does not apply to Hawaii, Alaska, U.S. territories, or international addresses. Additional charges may apply for remote delivery areas.

Sealing: Thassos White marble must be sealed before grouting and immediately after installation with a premium penetrating stone sealer. Due to its exceptionally pure, low-iron composition, it is highly absorbent — seal every 6–12 months in wet areas such as showers and bathroom floors to prevent staining and moisture infiltration. A topical enhancer sealer is not recommended, as it may alter the natural bright white appearance.

Cleaning: Clean with a pH-neutral stone cleaner or mild dish soap diluted in warm water; rinse thoroughly and dry with a soft cloth to prevent water spots. The high-polish surface is especially susceptible to etching from acidic substances — never use vinegar, citrus-based cleaners, grout haze removers, or any product containing acid, bleach, or ammonia. Wipe up spills immediately, particularly from coffee, wine, citrus juice, and toiletry products.

Installation: Always use bright white polymer-modified thinset mortar — never gray thinset, which can telegraph color through the stone and alter its brilliant white appearance. Back-butter each tile fully in addition to applying thinset to the substrate to achieve 95%+ coverage and prevent lippage on this large format. Use non-sanded or fine-sanded grout with joints no wider than 1/16–1/8 inch for a near-seamless look. Ensure the substrate is flat to within 1/8 inch over 10 feet to prevent cracking. Allow tiles to acclimate to room temperature before installation.

Important: Inspect all tile before installation. Variations in color, veining, and texture between pieces are natural characteristics of genuine stone — not defects. Order 10% overage for cuts, waste, and future repairs. Tile & Mosaic Depot specialists are available M–F 8:30AM–5PM PST at 855-797-8453.

Why Tile & Mosaic Depot

The natural stone specialists

Quarry-Direct Pricing

We buy direct from the source and skip the middleman, so you get showroom-quality stone for less.

Huge Stone Selection

Marble, travertine, limestone, porcelain and more — thousands of tiles, mosaics, and slabs in one place.

Expert Stone Support

Talk to real natural-stone specialists, M–F 8:30AM–5PM PST, at 855-797-8453 or via live chat.

Easy 30-Day Returns

Uninstalled tile can be returned within 30 days. Order with full confidence.

Why Order a Sample
A screen can't show you how Calacatta veining reads under your kitchen lights or how a porcelain finish sits next to your cabinet color. A sample can. It's the single best way to buy stone or porcelain tile with confidence — and the cheapest mistake you'll ever avoid.

How It Works
Samples are $7.99 each. Samples ship free and leave our warehouse within 1–3 business days. Sizes vary by material and availability — typically 3"×3" up to 8"×8" — and every sample is cut from the same material stocked for full orders.

What a Sample Shows
Color, texture, finish, and overall character. Because natural stone varies piece to piece, one sample represents the material but can't show the full range of a lot. Porcelain samples are highly representative of the production run. Want to see the current lot before you commit? Ask us — we'll send photos.

Good to Know

Samples are final sale — non-returnable and non-refundable.
We recommend sampling before every full order, especially for natural stone.
Larger or custom quantity? Contact us for a tailored quote.

Talk to a Specialist
Our stone and tile specialists will help you narrow it down. Call (855) 797-8453 or email sales@tileandmosaicdepot.com, Monday–Friday, 8:30 AM–5 PM PT.

How Your Order Ships
In-stock orders leave our warehouse within 2–3 business days. Stone, porcelain, and mosaic ship on a pallet via scheduled LTL freight and arrive 2–10 business days after dispatch, depending on destination. You'll get tracking and the carrier's name by email the day it ships.

Freight Delivery — What to Expect

The carrier calls you first. Every freight delivery is by appointment. Expect a call or text to set a window before the truck is dispatched.
Curbside delivery. The driver unloads to the curb or driveway. Freight does not include carrying material indoors or into a garage — plan for a helper or a hand truck.
Someone 18+ must sign. Inspect the pallet before signing. Note any damage, shortage, or broken shrink-wrap on the delivery receipt — this is what makes a claim valid.
Truck access. The address must be accessible to a full-size freight truck with enough space to unload.

Free Shipping
Free curbside freight on qualifying mosaic and molding orders over $1,999 in the continental U.S. Field tile, porcelain, and other product types ship at freight rates shown at checkout. Not available to Hawaii, Alaska, U.S. territories, or international addresses.

Damage & Shortages
Report within 3 calendar days of delivery with photos of the pallet, packaging, and affected pieces to sales@tileandmosaicdepot.com. Verified claims are covered. Shortages of 1–5 pieces are refunded rather than reshipped — which is why we recommend ordering 10% overage.

30-Day Returns
Uninstalled tile in full, unopened boxes may be returned within 30 days of delivery. Return freight is paid by the customer. Partial boxes, opened boxes, installed material, and samples are final sale.

Questions Before You Order?
Call (855) 797-8453 or email sales@tileandmosaicdepot.com, Monday–Friday 8:30 AM–5 PM PT. If you're unsure about freight access at your address, ask us before checkout — we'll flag anything that could hold up delivery.

Natural Variation
Quarried stone varies in color, veining, shade, movement, and finish from piece to piece and from lot to lot. Screen photos and samples show the range, not the exact tile you'll receive. Variation is the nature of the material and is never grounds for return. Porcelain is far more consistent, but shade and pattern can still shift between production runs — buy your full quantity in one order.

Before You Install

Order 10% overage. Covers cuts, breakage, and spares for future repairs. Reorders may not match in tone or lot.
Inspect every piece before setting. Pull from all boxes, blend, and dry-lay the full area. Installation is acceptance — no claims are honored once tile is set.
Hire a qualified installer. Natural stone and large-format porcelain require experience with the material. Your installer is responsible for substrate, setting materials, and method.

Sealing & Care
Natural stone should be sealed with a penetrating sealer and re-sealed periodically in wet and high-traffic areas. Clean with a pH-neutral stone cleaner only — vinegar, bleach, ammonia, and acidic cleaners etch marble, limestone, travertine, and onyx permanently. Porcelain does not require sealing. Outdoor stone weathers and shifts in tone over time; this is expected.

Responsibility
Tile & Mosaic Depot supplies material only. We are not responsible for installation, labor costs, substrate conditions, setting materials, product misuse, or damage from handling, sealing, maintenance, or chemicals. No claims, returns, or replacements are accepted on installed material.

California Proposition 65
Some natural stone and porcelain products contain substances known to the State of California to cause cancer or reproductive harm. Details at www.P65Warnings.ca.gov.

The Natural Stone & Porcelain Tile Specialists

Direct from the Producers

We buy directly from the mills and factories that cut and finish our tile, so pricing stays sharp and lots stay consistent.

Samples Ship Free

$7.99 per sample with no shipping charge, shipped within 1–3 business days. See the current material before you commit.

Ask a Specialist

Email us anytime with a question about our products at sales@tileandmosaicdepot.com. We'll get back to you during our business hours, Mon–Fri 8:30 AM–5 PM PT.