Procurement Solution
Marble Double Sinks: Two Bowls, One Model, One Block Set
A double sink fails when its two bowls come from two orders. We carve both from one buyer-approved 3D model and one matched block set, drill drains to your plumbing drawing and inspect the pair side by side before packing.
The buyer's pain point and our technical solution
A marble double sink program succeeds or fails on one question: were the two bowls carved as a pair, or assembled from two orders? Buyers searching marble double sink are usually fitting a shared vanity — a family bathroom, a hotel suite, a spa ritual room — where two basins stand side by side and every mismatch is visible at arm's length. Solid-carved stone sinks magnify the risk: each bowl is carved from its own block, so tone, veining and even bowl profile can drift between pieces sourced separately. Drain positions add a second failure mode — a bowl carved without the plumbing drawing becomes a site re-cut on stone.
What that costs the buyer
A mismatched pair undermines the exact effect the double sink was chosen for. Shimming and rejected pieces absorb installation days; a drain hole that misses the rough-in turns a finished bathroom into a re-cut queue; and a showroom pair that reads as two stones stops selling the concept it was displayed to prove.
Our solution: one 3D model, one block set, one inspection line
- 3D model approved before carving: every sink program starts from a model the buyer signs off — bowl profile, drain and tap positions, pedestal or integration detail — so the stone is carved to the drawing, not to a guess.
- Matched block allocation: both bowls of a pair come from one block set so tone and veining continue across the pair; sets are inspected side by side before packing.
- Hand carving with 5-axis CNC finishing: solid blocks are shaped by hand and finished on 5-axis CNC — the same discipline documented across our Bianco Crystal and Red Sandalwood sink programs.
- Plumbing-first drilling: drain and tap holes are positioned to your plumbing drawing before carving, eliminating the site re-cut that ruins finished bathrooms.
- Program flexibility: single-piece showroom orders accepted; hotel and spa programs quoted per project, lead time 25–35 days from model approval.
Value for the buyer
The pair that opens from the crate is a pair — one model, one block set, drains where the pipes are — and it installs without re-cutting stone on site.
Documented project cases
Twin-bowl guest-bath program from one 3D model
- Client / commission
- Hotel project contractor, Southeast Asia
- Stone used
- Solid-carved stone double-bowl vanity sinks, customized from 3D models for guest bathrooms
- What it solved
- Freestanding double sinks sourced from separate carvers arrived with bowl profiles that did not match within a pair
- Before
- Mismatched bowl profiles and drain positions forced on-site shimming and rejected pieces
- Now
- Both bowls carved from matched blocks against one approved 3D model; pairs inspected side by side before packing and accepted at first inspection
- Where the data comes from
- Project order records and contractor acceptance notes
Boutique spa double-pedestal installation
- Client / commission
- Spa fit-out company, Europe
- Stone used
- Granite double pedestal sinks for spa changing suites
- What it solved
- Plumbing rough-ins were fixed before stone selection; basin drain spacing had to match the existing pipe positions exactly
- Before
- A previous stone sink order arrived with drain holes that missed the rough-in, requiring re-cutting on site
- Now
- Drain positions drilled to the plumbing drawing before carving; both pedestals set without site modification
- Where the data comes from
- Company order records and installer correspondence
Showroom display pair matched for veining
- Client / commission
- Bathroom showroom, North America
- Stone used
- Marble double-bowl display sink cut from matched blocks for the sales floor
- What it solved
- A display pair carved from unrelated blocks read as two different stones on the floor
- Before
- The first display pair drew questions about whether the two bowls were the same material
- Now
- Replacement pair allocated from one block set so the veining continues across both bowls; the display became the floor's reference piece
- Where the data comes from
- Company Stone Sample Matching pre-sales records and order file
Client reviews and ratings
Client reviews on file for double-bowl sink programs (star ratings drawn from our order records and follow-up notes):
- ★★★★★
Hotel project contractor: “One 3D model for both bowls ended the mismatch problem — the pairs opened from the crate already matched.” Verifiable result: twin-bowl program accepted at first inspection with no rejected pieces (source: contractor acceptance notes).
- ★★★★☆
Spa fit-out company: “Drain positions drilled to the plumbing drawing saved us a re-cut on finished walls. Carving lead time needs early booking.” Verifiable result: pedestals set without site modification against fixed rough-ins (source: installer correspondence and order records).
- ★★★★★
Bathroom showroom buyer: “The matched veining across the pair is what customers ask about — it became our reference display.” Verifiable result: replacement pair allocated from one block set and displayed as the floor's reference piece (source: Stone Sample Matching pre-sales records).
Certificates and compliance records
ISO-certified production processes
Solid carving, 5-axis CNC finishing and pre-shipment inspection for sink programs run under our documented ISO-certified process controls; certificate scope and validity are provided with quotations on request.
3D model approval workflow
Every sink program starts from a 3D model approved by the buyer before carving; model files, revision history and inspection records against the approved model are retained in our factory documentation and available to buyers on request.
Company strength
Apexstone Amoy Marble and Granite, founded in 2002, exports to 42 countries from Xiamen, China. Solid sink and basin programs are carved by hand and finished on 5-axis CNC at our Shuitou factory, customized from buyer-approved 3D models under ISO-certified process controls documented in our factory records. Single-piece orders are accepted for showrooms and replacements.
Sourcing runs through our Shuitou hub — 2,400+ natural stone types with 85% direct quarry buying from China, Italy, Turkey, Iran, Brazil and Spain — including the granite and marble families used for carved sink programs. R&D includes the StoneGPS.cn platform, developed over three years, and The StoneBooks reference collection, commissioned by Harvest Asia Pacific (Hongkong) Ltd., used by institutions including Cendes Design Studio, Shanghai Institute of Visual Art (Fudan University), National Cheng Kung University and the National Taiwan Museum.
Exhibition record since 2005 includes Coverings (USA), INDO BUILD TECH (Jakarta) and the Xiamen International Stone Fair. Company profile figures: 51–200 staff, USD 20M annual revenue scale, selection by six-star hotels documented in the company profile.
Related products
Red Sandalwood Marble Sinks, Bathtubs & Vessel Basins
Red Sandalwood (紫檀金沙) marble solid stone sinks, freestanding bathtubs, and vessel basins carved from single blocks. Purple base with wood-grain diagonal stripe veining. Hand-carved with 5-axis CNC precision for boutique hotel bathrooms, spa installations, and luxury residential projects. Stone sink and bathtub supplier Apexstone - 42+ countries since 2002.
Bianco Crystal Granite Sinks & Tubs
Solid-carved Bianco Crystal granite vessel and pedestal sinks, integrated sink countertops, bathtubs, and shower trays, customized from 3D models for hotel and residential bathrooms.
Portuguese Grey Limestone Carvings - Bathtubs, Sinks & Sculptural Elements
Portuguese Grey limestone carved bathtubs, vessel sinks, and sculptural elements. Hand-carved from solid blocks at Apexstone's Shuitou factory with 5-axis CNC precision. Warm grey tones with fossil shell detail for hospitality, spa, and luxury residential projects.
Match the double-bowl layout to your installation
Select an option in each group to see the matching production rule.
Procurement FAQ
- Can both bowls of a double sink be carved from matching stone?
- Yes — pairs are allocated from one block set so tone and veining read as one piece, and both bowls are inspected side by side before packing. Identical veining across two carved bowls cannot be promised on natural stone; continuity is planned and confirmed at block allocation.
- How are drain and tap positions handled?
- Positions are drilled to your plumbing drawing before carving. Send the rough-in dimensions with the order; the 3D model you approve shows the drain and tap layout exactly as it will be carved.
- Which stones work best for carved double sinks?
- Granites such as Bianco Crystal suit daily family and hotel duty; marbles and limestones read warmer for spas and boutiques but need a stated care routine. The trade-off is declared per stone in the quotation.
- What is the minimum order?
- Single-piece orders are accepted for showrooms and replacements; hotel and spa programs are quoted per project. Every piece follows the same 3D model approval and inspection discipline.
- How long does a carved sink program take?
- Lead time runs from approval of the 3D model, typically 25–35 days to shipment for standard programs; complex spa integrations are scheduled at quotation.
Request a double-bowl sink quotation with 3D model approval
Send the bowl count, plumbing drawing and the stone you have in mind. We reply with a 3D model for approval, block allocation for matched pairs and a quotation — the model is approved before the first cut.