Thassos White Marble 18x18 honed natural stone tile showing smooth, white marble surface with subtle veining.

Thassos White Marble 18x18 honed natural stone tile with smooth surface, ideal for flooring and wall applications.

Thassos White Marble 18x18 Honed Marble Tile

TWM18X18H0182

SAMPLES SHIP FREE WITHIN 1–3 BUSINESS DAYS

$28.95 / sq. ft.

$65.14 / 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.

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.

About Thassos White Marble 18×18 Honed Tile

Material Education

Thassos White is a pure, crystalline marble quarried exclusively from the Greek island of Thassos in the northern Aegean Sea. Renowned as one of the whitest marbles in the world, it displays a brilliant, almost luminous snow-white ground with a fine sugar-like crystalline texture and virtually no veining. Its unique optical purity sets it apart from other white marbles, making it a perennial choice for high-end residential and commercial projects.

As a natural stone, each Thassos tile carries its own subtle character — minor tonal shifts or faint crystalline inclusions are the genuine signature of authentic quarried marble, not imperfections.

About this tile: This 18×18 honed tile offers a large-format, matte-smooth surface that emphasizes the stone's extraordinary whiteness across expansive floor and wall installations, reducing grout lines for a seamless, gallery-like effect.

Design & Inspiration

Thassos White's pristine, cool-white palette pairs beautifully with polished chrome, brushed nickel, soft white oak cabinetry, and pale linen tones, slotting effortlessly into spa, minimalist, transitional, and classic Grecian design schemes. Its near-total absence of veining lends itself equally to understated contemporary interiors and crisp, clean traditional bathrooms.

The 18×18 large-format honed tile creates a calm, uninterrupted expanse of white ideal for master bathroom floors, shower floors and walls, or open-plan living areas where visual continuity is paramount. The honed finish softens the stone's reflectivity just enough to feel warm and tactile while preserving its striking brightness.

Popular design combinations: pair 18×18 Thassos honed floor tiles with a Thassos 1×2 herringbone mosaic on the shower niche accent wall and polished chrome fixtures for a cohesive all-white spa suite. 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

Thassos White Marble is sourced exclusively from the island of Thassos in the northern Aegean, celebrated for producing the purest, most luminous white marble on earth. Its dense crystalline structure and near-zero veining deliver an unrivaled, gallery-white aesthetic that elevates any space it inhabits.

Finished with a honed surface, this 18×18 tile presents a smooth, low-sheen face that diffuses light softly — reducing glare while accentuating the stone's bright white tone. The large format minimizes grout joints, creating a seamless, flowing plane that is as easy to clean as it is visually impressive.

Ideal for master bathroom floors, wet room walls, spa shower surrounds, and upscale foyer installations, this tile performs beautifully in both wall and floor applications. Because Thassos is a premium clearance material, quantities are limited — ordering a sample before committing to a full order is strongly recommended.

Material	Natural Marble
Color	Bright White
Type	Field Tile
Tile Size	18 × 18 inches
Finish	Honed
Sold By	Per Sq. Ft.
Application	Floor & Wall (Indoor)
Shade Variation	V1 — Uniform
Design	Contemporary / Transitional / Traditional
Country of Origin	Europe

✓ Master Bathroom FloorLarge format minimizes seams, maximizes elegance

✓ Shower Walls & SurroundsHoned finish resists glare in wet environments

✓ Foyer & Entryway FloorPristine white makes a striking first impression

✓ Feature Wall or AccentUnbroken white plane adds spa-like serenity

— Outdoor or Freeze-Thaw EnvironmentsDense but unsealed marble is not rated for outdoor frost exposure

— High-Traffic Commercial Floors (Unsealed)Must be sealed and maintained regularly to prevent staining and etching

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 a highly absorbent, pale stone that requires thorough sealing before installation and regular resealing every 6–12 months in wet areas such as showers and bathroom floors. Use a premium penetrating (impregnating) stone sealer specifically formulated for white or light-colored marble to prevent moisture, oils, and minerals from penetrating the surface.

Cleaning: Clean with a pH-neutral stone cleaner and a soft mop or cloth — never use acidic cleaners (vinegar, citrus), bleach, or abrasive scrubbers, as these will etch or dull the honed surface. Wipe up spills immediately, especially colored liquids such as coffee, wine, or juice, as the brilliant white surface will show staining readily. Avoid standing water on grout joints.

Installation: Use bright-white polymer-modified thinset mortar to preserve Thassos's pure white appearance — gray thinset can telegraph through the stone. Back-butter each tile fully in addition to combing the substrate to ensure 95%+ coverage and prevent lippage on this large format. Use flat-profile leveling clips to keep the field perfectly plane. Allow thinset to cure fully before grouting, and use a white non-sanded or sanded grout appropriate to your joint width.

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.