Honed Thassos White Marble quarter round trim for moldings and trims, showing smooth, polished surface and rounded edge detail.
Honed Thassos white marble quarter round trim for moldings and trims, showcasing smooth finish and elegant natural marble texture.
Honed Thassos White Marble quarter round trim for moldings and trims, showing smooth, polished surface and rounded edge.
Honed Thassos White Marble quarter round trim for moldings and trims, showing smooth, polished surface and rounded edge detail.
Honed Thassos white marble quarter round trim for moldings and trims, showcasing smooth finish and elegant natural marble texture.
Honed Thassos White Marble quarter round trim for moldings and trims, showing smooth, polished surface and rounded edge.

Thassos White Marble Honed Quarter Round Trim

TWMP1x12HL0043

SAMPLES SHIP FREE WITHIN 1–3 BUSINESS DAYS
$19.49 / Piece
QUANTITY
TOTAL PRICE:
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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.
Ships in 2–3 Days
Free Sample Shipping
Nationwide Delivery
Premium Natural Stone
Secure Packaging

The Thassos White Marble Honed Quarter Round Trim is crafted from the purest white marble in the world, quarried on the Greek island of Thassos and prized for its snow-bright, crystalline appearance and exceptional uniformity of color. This molding brings the same luminous quality as Thassos field tiles to the finishing details of your installation.

The honed surface provides a smooth, matte finish that is understated and elegant, with a gentle sheen that complements both polished and honed tile fields. The quarter round profile curves gracefully from wall to countertop or floor, replacing sharp exposed edges with a soft, architectural transition that elevates the overall quality of the finished space.

This trim is ideal for use in shower surrounds, bathroom vanities, tub decks, and kitchen backsplash installations wherever a clean edge termination is required. As a clearance or specialty trim item, we recommend ordering a sample to confirm color match with your field tile before committing to a full order.

Material Natural Marble
Color Pure White
Type Marble Molding — Quarter Round Trim
Finish Honed
Sold By Per Linear Foot
Application Wall & Trim (Indoor)
Shade Variation V1 — Uniform
Design Contemporary / Transitional / Traditional
Country of Origin Europe
✓ Shower Surround Edge TrimFinishes exposed tile edges cleanly and safely
✓ Tub Deck TransitionElegant curved profile from tile to tub ledge
✓ Vanity Backsplash TerminationPolished, professional edge at countertop junction
✓ Kitchen Backsplash TrimSoft curved finish at cabinets or open edges
— Outdoor UseNot recommended — freeze-thaw cycles may damage marble
— Floor Transition UseProfile not suited for underfoot traffic or floor thresholds

Free Shipping: As a molding, this product qualifies for free curbside shipping on orders over $1,999 within the continental U.S. Orders below that threshold ship at standard rates calculated at checkout.

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, despite its density, is a pure calcite marble and should be sealed with a penetrating stone sealer before grouting and after installation. In wet areas such as showers, reseal every 6–12 months to prevent moisture infiltration and staining along the grout joint. Given its bright white color, diligent sealing is especially important to guard against any discoloration from soap, minerals, or organic matter.

Cleaning: Clean with a pH-neutral stone cleaner and a soft cloth or sponge — never use acidic cleaners (vinegar, citrus), alkaline degreasers, or abrasive scrubbers, as these will dull the honed surface and etch the calcite. Wipe up spills promptly, especially from acidic substances like shampoo, conditioner, or citrus-based soaps commonly found in shower environments.

Installation: Use white polymer-modified thinset mortar to avoid any gray bleed-through behind the bright white stone. Secure the quarter round with full back-buttering to ensure complete contact along the curved profile. Use non-sanded or unsanded grout for tight joints to avoid scratching the honed surface, and allow full cure time before exposing to moisture.

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.

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