Polar Thassos White 12x12 Polished Marble Tile - TILE & MOSAIC DEPOT

Polar Thassos White 18x18 Honed Marble Tile

PWM18X18H0181

SAMPLES SHIP FREE WITHIN 1–3 BUSINESS DAYS

$12.95 / sq. ft.

$29.14 / 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 18×18 Honed Marble Tile

Material Education

Thassos White is an exceptionally pure white marble quarried from the Greek island of Thassos in the Aegean Sea, renowned worldwide for producing some of the whitest, most luminous stone available. Its crystalline dolomitic structure gives it a distinctive sugar-white brightness and a subtle translucency that few other marbles can match. The honed surface reveals a soft, matte sheen that highlights the stone's clean white body with minimal veining — a rare find among natural stones.

As a genuine natural stone, each tile may exhibit minor variations in crystal density, faint cloud-like movement, or delicate grey wisps — these nuances are the hallmark of authentic Thassos marble and contribute to its unique, living character.

About this tile: This 18×18 large-format honed tile offers generous coverage per piece, making it ideal for creating seamless, uninterrupted white surfaces across floors and walls. The oversized format minimizes grout lines, amplifying the stone's characteristic brightness and lending a sophisticated, spa-like continuity to any space.

Design & Inspiration

The pristine, cloud-white palette of Thassos pairs beautifully with warm brass and gold fixtures, cool chrome hardware, dark Nero Marquina accents, or the natural warmth of white oak cabinetry. It is equally at home in minimalist modern interiors, serene spa-inspired bathrooms, and timeless classical settings.

The 18×18 format is particularly effective in master bathrooms, spa wet rooms, and open-concept living areas where large expanses of uninterrupted white stone create a sense of calm, cleanliness, and luxury. The honed finish softens the stone's reflectivity for a more understated, refined aesthetic compared to polished marble.

Popular design combinations: pair Thassos White 18×18 honed floors with a Thassos or Calacatta polished mosaic accent wall and brushed gold fixtures for a bespoke luxury 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 Thassos island quarries of the Aegean, celebrated for yielding the purest, most brilliantly white marble in the world. Its dense crystalline structure gives it an unmistakable sugar-white brightness and a subtle inner glow that elevates any interior it graces.

Finished with a precision hone, this 18×18 tile presents a smooth, matte surface that diffuses light softly and evenly — making it feel luxurious without being overly reflective. The large format minimizes grout joints, creating a near-seamless white plane that reads as both modern and timeless, and the manageable square shape makes layout planning and installation straightforward.

Ideal for master bathroom floors, shower floors and walls, feature walls, and high-end living spaces where a pristine white stone makes a statement. As a clearance or special-order item, we recommend ordering a sample first to confirm color and finish in your lighting conditions, and ordering 10–15% overage to account for cuts and future repairs.

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

✓ Master Bathroom FloorSeamless white expanse with minimal grout lines

✓ Shower Walls & FloorBright, spa-quality surface with honed slip resistance

✓ Feature & Accent WallsLuminous white backdrop for any living space

✓ Foyer & EntrywayGrand, classic arrival statement in white stone

— Outdoor UseNot recommended — freeze-thaw cycles can damage marble

— High-Traffic Commercial FloorsSealing and maintenance required; honed marble can absorb stains

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 is an exceptionally pure and porous marble that requires thorough sealing before use and regular maintenance sealing every 6–12 months, especially in wet areas such as shower floors and bathroom floors. Given its bright white color, even minor staining or moisture penetration is highly visible — applying a premium penetrating stone sealer is strongly recommended upon installation and after any deep cleaning.

Cleaning: Clean with a pH-neutral stone cleaner diluted in warm water and a soft microfiber mop or cloth. Avoid all acidic cleaners (vinegar, citrus, grout haze removers) and alkaline products, as they will etch the honed surface and dull its finish. Wipe up spills — especially oils, coffee, and wine — immediately, as the white stone shows staining very readily.

Installation: Use white polymer-modified thinset mortar to prevent any grey or dark adhesive from telegraphing through the translucent stone. Back-butter each tile in addition to applying thinset to the substrate for full, void-free coverage. Use a 3/16" to 1/4" notched trowel. For shower applications, ensure a proper waterproof membrane is installed beneath the tile. Allow joints of at least 1/16" and use a non-sanded white grout for a clean, seamless appearance.

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.