Thassos White Marble 18x18 Polished Marble Tile - TILE & MOSAIC DEPOT

Thassos White Marble 18x18 Polished Marble Tile

Name: Thassos White Marble 18x18 Polished Marble Tile
Brand: TILE AND MOSAIC DEPOT
SKU: TWM18X18P0181
Price: 28.95 USD
Availability: InStock

SAMPLES SHIP FREE IN 1 TO 3 BUSINESS DAYS!

$28.95 / sq. ft.

$65.14 / Piece

QUANTITY

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

Sq. Ft.

pieces

Minimum Purchase: 50 sq.ft.

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

TOTAL PRICE:

—

Order your full amount plus ~10% overage at once, as reorders may vary in tone and veining. Verified shipping damage is covered with clear photos — but small tile quantities (1–5 pieces) are refunded rather than reshipped, so ordering extra 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 Polished Tile

Material Education

Thassos White is a rare, pure white crystalline marble quarried exclusively from the Greek island of Thassos in the Aegean Sea. Renowned for its exceptional brightness and luminous quality, it displays a near-flawless white field with a brilliant crystalline structure and a reflective, glass-like sheen when polished. Its purity of color is virtually unmatched among natural stones, making it one of the most sought-after marbles in luxury design.

As a genuine natural stone, Thassos White may exhibit subtle variations in crystal density, occasional faint veining, or minor tonal shifts from piece to piece — these are the authentic signatures of natural marble, not imperfections.

About this tile: This 18×18 field tile format delivers large, uninterrupted expanses of brilliant white stone, ideal for flooring and wall cladding applications where maximum visual impact is desired. The generous size minimizes grout lines, allowing the stone's natural luminosity to take center stage.

Design & Inspiration

Thassos White's pure, ice-bright palette pairs beautifully with polished chrome, brushed nickel, warm brass fixtures, and crisp white cabinetry, as well as contrasting elements like Nero Marquina black marble or dark-stained walnut. It suits a wide range of aesthetics — from minimalist contemporary and sleek spa-inspired interiors to classical Mediterranean and transitional luxury spaces.

The 18×18 format laid in a straight-set or offset pattern creates seamless, expansive surfaces that visually enlarge a room and amplify natural light. In bathrooms and spa retreats, the polished surface acts almost like a mirror underfoot, reflecting light and lending an unmistakable sense of opulence.

Popular design combinations: pair large-format Thassos White floor tiles with a contrasting Nero Marquina marble border or mosaic accent strip for a timeless black-and-white luxury look. 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 one of the world's purest and most luminous natural stones, quarried exclusively from the island of Thassos in the Aegean and celebrated for its brilliantly white, crystalline character. This 18×18 polished tile showcases that iconic brightness at a generous scale, making it a premier choice for luxury residential and commercial projects alike.

Each tile is finished to a high polish, enhancing the stone's natural crystalline sparkle and creating a smooth, reflective surface that amplifies light throughout any space. The large 18×18 format allows for minimal grout joints, producing clean, uninterrupted surfaces that feel both expansive and refined.

Ideal for master bathroom floors, shower walls, spa retreats, and elegant foyer installations, these tiles bring a hotel-caliber aesthetic to any setting. Because Thassos White is exceptionally bright and porous, sealing before and after grouting is strongly recommended — ordering a sample first is advised to appreciate the stone's true luminosity in your own lighting conditions.

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

✓ Bathroom FloorLuminous surface amplifies light and space

✓ Shower WallSeamless white backdrop for spa aesthetics

✓ Foyer & EntrywayGrand, impressive first impression underfoot

✓ Feature WallPolished reflectivity elevates accent walls

— Outdoor UsePolished marble not suitable for exterior or frost-exposed areas

— High-Traffic Commercial FloorsPolished surface can scratch and etch; seal and maintain diligently

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 porous, pure white marble that requires diligent sealing to prevent staining. Apply a premium penetrating stone sealer before grouting and again after installation. In wet areas such as showers and bathroom floors, reseal every 6–12 months. Because of its white color, even minor stains can be visible — do not skip or delay sealing.

Cleaning: Clean with a pH-neutral stone cleaner and a soft mop or cloth — never use acidic cleaners (vinegar, lemon-based), bleach, or abrasive scrubbers, as these will etch and dull the polished surface permanently. Wipe up spills, especially acidic liquids like wine, juice, or coffee, immediately. Avoid steam mops on polished marble floors.

Installation: Always use bright white polymer-modified thinset mortar to avoid any gray bleed-through on this pure white stone. Back-butter each tile in addition to applying thinset to the substrate to ensure full coverage and prevent hollow spots. Use non-sanded grout in a matching white tone for joints under 1/8 inch, or sanded grout for wider joints. Allow thinset to cure fully before grouting. Handle tiles with care during installation to avoid chipping the polished edges.

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.

Every order is packed by hand and shipped with care from our U.S. fulfillment centers. Here's exactly what to expect from checkout to delivery.

Processing & Transit
In-stock orders are processed within 2–3 business days. Most tile and stone orders ship via scheduled LTL freight and typically arrive 2–10 business days after dispatch, depending on your destination. You'll receive tracking and carrier details by email as soon as your order leaves our warehouse.

Freight Delivery

Curbside delivery. The carrier unloads at the curb or driveway nearest your address; delivery does not include moving materials indoors or into a garage.
Scheduled appointment. The freight company contacts you directly to arrange a delivery window.
Signature required. An adult (18+) must be present to inspect and sign for the shipment.
Clear access. Please ensure the delivery site is reachable by a freight truck and free of obstructions.

Free Shipping
Free curbside shipping is available on qualifying mosaic and molding orders over $1,999 within the continental U.S. Tile, porcelain, and other product types ship at standard freight rates calculated at checkout. Free shipping does not apply to Hawaii, Alaska, U.S. territories, or international addresses.

Inspection & 30-Day Returns
Please inspect every shipment before signing the carrier's delivery receipt, and note any visible damage, shortage, or tampering directly on the receipt. Report concerns within 3 calendar days at sales@tileandmosaicdepot.com. Uninstalled tile may be returned within 30 days of delivery; installed material and samples are final sale.

Need a hand? Our team is glad to help — call (855) 797-8453 or email sales@tileandmosaicdepot.com, Monday–Friday, 8:30 AM–5 PM PST.

Product & Installation Guidance

Natural stone is a product of the earth — every piece is one of a kind. A little planning ensures your finished installation looks its best and lasts for decades.

Natural Variation
Color, veining, texture, shade, movement, finish, and sizing vary from piece to piece. Product photos and samples are a general reference and may not match the exact material you receive. These variations are inherent characteristics of natural stone — they are part of its beauty, not defects.

Before You Install

Order roughly 10% extra to allow for cuts, waste, and future repairs.
Blend tiles from multiple boxes as you work to achieve the most natural, balanced appearance.
Dry-lay and inspect the full layout before setting a single tile.
Installation constitutes full acceptance of the product, so review everything carefully first.

Sealing & Care
Natural stone should be sealed with a quality penetrating sealer before and after installation, and re-sealed periodically in wet or high-traffic areas. Clean only with a pH-neutral stone cleaner; avoid acidic products, bleach, vinegar, and ammonia, which can permanently etch the surface. Outdoor installations may weather or change tone over time with exposure.

Responsibility
Tile & Mosaic Depot is not responsible for improper installation, labor costs, substrate conditions, product misuse, or damage from improper handling, sealing, maintenance, or harsh chemicals. No claims, returns, or replacements can be accepted on installed material.

California Proposition 65: Some natural stone products contain substances known to the State of California to cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Order a Sample First

Seeing real stone in your own space — under your own light, beside your own finishes — is the best way to buy with confidence. We make it easy and affordable.

How It Works
Samples are just $7.99 each with free shipping, and they ship in 1–3 business days. Sizes vary by material and availability, typically ranging from 3"×3" up to 8"×8". Exact dimensions aren't guaranteed, but every sample is cut from the same material you'll receive in a full order.

What a Sample Shows
Samples help you evaluate the general color, texture, finish, and overall character of a product before committing to a full order. Because natural stone varies from piece to piece, your sample is representative — it may not capture the complete range of variation across an entire lot. For current lot photos, just ask our team.

Good to Know

Samples are final sale — non-returnable and non-refundable.
Ordering a sample before a full purchase is always recommended, especially for natural stone.
Planning a larger or custom quantity? Contact us for a tailored quote.

Questions before you order? Our stone specialists are happy to help you choose — call (855) 797-8453 or email sales@tileandmosaicdepot.com, Monday–Friday, 8:30 AM–5 PM PST.