Thassos White Marble 18x18 polished natural stone tile with smooth surface, showcasing bright white marble with subtle veining.
Polished Thassos White Marble 18x18 natural stone tile with smooth surface, ideal for elegant flooring or wall applications.
Polished Thassos White Marble tile 18x18 inches, natural stone surface with smooth finish for elegant flooring or wall applications.
Thassos White Marble 18x18 polished natural stone tile with smooth surface, showcasing bright white marble with subtle veining.
Polished Thassos White Marble 18x18 natural stone tile with smooth surface, ideal for elegant flooring or wall applications.
Polished Thassos White Marble tile 18x18 inches, natural stone surface with smooth finish for elegant flooring or wall applications.

Thassos White Marble 18x18 Polished Marble Tile

TWM18X18P0181

SAMPLE SHIPS FREE • 2–3 DAY EXPRESS AVAILABLE
$28.95 / sq. ft.
$65.14 / Piece
QUANTITY
SOLD BY: sq ft Minimum: 50 sq. ft.
Minimum order: 50 sq. ft.
TOTAL PRICE:
—
Samples ship free · Fast nationwide shipping · 30-day returns
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.
Thassos White marble polished tile in pure crystalline white with virtually no veining for luxury bathroom and spa application — Tile & Mosaic Depot

Thassos White Marble

Thassos White marble — the purest, most brilliantly white marble in the world. Quarried exclusively on the Greek island of Thassos with crystalline white and virtually no veining. Tile and mosaic formats in polished and honed finishes for luxury bathrooms, spa spaces, and pool interiors. Free sample shipping on all products.
  • MaterialNatural marble
  • FinishPolished
  • Size18 × 18 in
  • Thickness3/8" or 1/2" (10–12 mm), varies by shipment
  • VariationV2, Slight
  • UseIndoor floor and wall

Thassos White Marble18 × 18 Polished

Pure white Thassos marble in an 18×18 polished format, with a bright, even field and fewer grout lines.

Thassos White is a pure white marble with a fine crystalline surface. In this 18×18 polished format, the field reads bright and clean. The glossy finish reflects light, and the larger size keeps grout joints to a minimum.

It is a porous stone, so plan to seal it before and after grouting. Use a bright white thinset to keep gray from showing through. Expect slight shade variation (V2): faint tonal shifts and occasional light veining from tile to tile.

Samples are $7.99 each, up to 10 per order. Samples ship free, within 1-3 business days. Your sample comes from the lot we have in stock now, so it shows that lot's actual color range and finish. Future lots may look lighter, darker, or more veined, so order your full quantity plus 10% at once to keep the whole job from one lot.

Order a sample, $7.99, ships free Ask a specialist

Where It Works

  • Bathroom wallsA bright, even backdrop for vanities and fixtures. Seal before and after grouting.
  • Feature wallsThe polished face reflects light and shows off the white field.
  • Kitchen backsplashA clean white surface behind the counter. Wipe spills promptly, especially acidic ones.
  • Low-traffic indoor floorsSuits an entry or foyer where wear is light. Keep the surface sealed.
  • Exteriors and frost-exposed areasPolished marble is not suited to outdoor or frost-exposed use.
  • High-traffic commercial floorsA polished finish can scratch and etch under heavy traffic.

Specifications

Material
Natural marble
Stone Type
Marble
Color
Pure white
Type
Field tile
Finish
Polished
Tile Size
18 × 18 in
Thickness
3/8" or 1/2" (10–12 mm), varies by shipment
Shade Variation
V2, Slight
Coverage
2.25 sq ft per tile
Origin
Europe
Application
Indoor floor and wall
Sold By
Per sq ft

Care & Cleaning

Seal It

Apply a penetrating stone sealer before grouting and again after installation. White marble shows stains easily, so keep the sealer current.

Clean It

Use a pH-neutral stone cleaner and a soft mop or cloth. Avoid vinegar, lemon-based cleaners, bleach, abrasive scrubbers and steam mops.

Expect This

Polished marble can etch or scratch with acids and abrasion. Slight tile-to-tile variation is part of natural stone.

Tile & Mosaic Depot supplies material only. Installation method, setting materials, and substrate are your installer's responsibility. Inspect every piece before setting; installation is acceptance, and installed material cannot be returned or claimed.

Questions

Will my tile match the sample?

Your sample comes from the lot we have in stock now, so it shows that lot's actual color range and finish. Future lots may look lighter, darker, or more veined, so order your full quantity plus 10% at once to keep the whole job from one lot.

Does Thassos White need sealing?

You can protect the white surface with a penetrating stone sealer, applied before grouting and again after installation. Marble is porous, so unsealed stone stains more easily.

What thinset should I use?

Use a bright white polymer-modified thinset. It keeps gray from showing through the white stone. Back-buttering each tile also helps give full coverage.

How much does one tile cover?

Each 18×18 tile covers 2.25 sq ft. The tile is sold per sq ft, so add 10% to your measured area for cuts and waste.

How do I order a sample?

Add up to 10 samples to your order at $7.99 each. Samples ship free and go out within 1-3 business days.




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.

30-Day Returns

Uninstalled tile in full, unopened boxes may be returned within 30 days. No partial returns. Order with confidence.

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