Views: 218 Author: Miluo Smart Home Publish Time: 2026-10-26 Origin: Site
Content Menu
● Why Source Marble Tubs from China?
>> What Recent Industry Data Actually Tells Buyers
● Selection Criteria: How to Evaluate a Marble Tub Manufacturer
● Understand the Product Before Comparing Suppliers
● Comparison Table: Production Capacity, MOQ, and Certification Visibility
● The Top 10 Marble Tub Manufacturers in China to Evaluate
>> 1. Jiaxing Miluo Smart Home Co., Ltd.
>> 3. Xiamen Realho Stone Co., Ltd.
>> 4. Apexstone Amoy Marble & Granite
>> 5. Xiamen Chstone Company Ltd.
>> 6. Xiamen Mega Stone Imp & Exp Co., Ltd.
>> 7. Quanzhou Zhenhao Stone Industrial Co., Ltd.
>> 9. Xiamen Asian Stone Co., Ltd.
>> 10. Xiamen Oriental Stone Co., Ltd.
● Technical Buying Guide: Specify Performance, Not Marketing Labels
>> 1. Define Material Grade with an Approval Schedule
>> 2. Separate Product Compliance from Management Certification
>> 3. Measure Capacity at the Bottleneck
● Buyer's Guide: Factory Verification, Samples, and Logistics
>> Verify the Factory Before Negotiating Exclusivity
>> Approve Samples Through a Controlled Sequence
>> Calculate Landed Cost, Not Just Factory Price
● An Overlooked Procurement Trap: Approving Appearance but Not Construction
● Conclusion: Choose the Right Manufacturing Model First
>> 1. How Can I Check Whether a Supplier's ISO Certificate Has Expired?
>> 2. Is a CE Certificate Enough to Approve a Marble Tub for Europe?
>> 3. Can I Order One Sample Before Committing to a Wholesale Program?
>> 4. How Can I Prevent Material Substitution After Sample Approval?
>> 5. Who Should Be Responsible If a Tub Arrives Cracked?
China offers international bathroom brands, wholesalers, and project buyers two distinct sourcing routes: natural marble bathtubs carved from stone blocks, and manufactured tubs made from mineral-filled composites or solid surface materials. Choosing the right route matters more than choosing the lowest quotation.
A supplier experienced in architectural stone carving may suit a luxury villa project but not a repeatable private-label bathroom collection. Conversely, a solid surface specialist may support coordinated product development without supplying genuine block-carved marble.
This guide compares ten China-based manufacturers and manufacturing suppliers across these different capabilities. Selection focuses on material transparency, development support, quality-control evidence, production visibility, export experience, and the practical requirements of long-term purchasing.
China's appeal lies in the combination of stone-processing expertise, custom manufacturing, coordinated bathroom product development, and export-oriented supply chains.
For natural marble bathtubs, Fujian is particularly relevant. Suppliers operating around Xiamen, Shuitou, Quanzhou, and Hui'an combine stone sourcing, architectural fabrication, and carving capabilities. The companies reviewed here illustrate this concentration: Apexstone describes a Hui'an carving team, while Mega Stone and Oriental Stone identify Shuitou-based production capabilities.
For manufactured bathroom collections, Zhejiang and Guangdong offer alternative sourcing options. Miluo operates in Jiaxing, Zhejiang, near Shanghai and Ningbo ports. KingKonree supplies solid surface sanitary ware and related materials from its China-based operation. These businesses serve a different procurement requirement from traditional natural-stone carving factories.
The 2025 China Stone Import & Export Trade Report, presented by a China Stone Material Association representative and covered by industry publications in 2026, reported stone exports of approximately 7.985 million metric tons, up 2.2% year over year. This figure concerns the broader stone industry, not marble bathtubs specifically. It should not be presented as the size of China's marble tub market.
The distinction is commercially important. Broad export activity demonstrates an established stone supply chain, but it does not prove that an individual supplier can consistently manufacture watertight, structurally suitable, well-finished bathtubs.
The most useful supplier assessment separates published claims from evidence that can support a purchase order.
| Evaluation area | Evidence to request | Why it matters |
|---|---|---|
| Material identification | Written material specification, construction description, and approved samples | Prevents substitution between natural marble, cultured marble, and marble-effect finishes |
| Manufacturing control | Factory address, equipment list, production walkthrough, subcontractor disclosure | Establishes who actually makes the product |
| Development capability | Drawings, revision records, mold or carving proposals, prototype plan | Demonstrates whether customization extends beyond color selection |
| Quality control | Inspection procedures, dimensional records, defect criteria, leak-test records | Makes acceptance measurable |
| Capacity and delivery | Bathtub-specific output, current order loading, production schedule | Distinguishes available capacity from general factory size |
| Compliance | Model-specific reports and applicable market documentation | Avoids relying on unrelated certificates |
| Export readiness | Packaging drawings, handling instructions, shipment documentation | Reduces damage and installation disruption |
| After-sales support | Written warranty, claims procedure, replacement terms | Clarifies responsibility before a problem occurs |
These are recommended purchasing criteria, not claims that every company below has passed an independent assessment.
"Marble tub" is not a sufficiently precise purchase specification.
For this shortlist, suppliers fall into two sourcing groups:
- Natural-stone manufacturers and fabricators offering carved marble or other stone tubs.
- Manufactured-material suppliers relevant to solid surface, resin-stone, or marble-style bathroom collections.
Miluo's website lists marble, solid surface, resin, and acrylic bathtub categories, while its company profile emphasizes solid surface and resin-stone products. KingKonree's published specialization is solid surface. Neither should automatically be treated as a supplier of block-carved natural marble without model-specific confirmation.
Your request for quotation should therefore identify the intended construction explicitly. A photograph of veining cannot establish whether a product is natural stone, a mineral-filled casting, or a decorative surface.
The reviewed public sources do not provide comparable, independently verified bathtub output figures or minimum order quantities for all ten suppliers. Rather than inventing numbers, the table identifies what is published and what remains to be confirmed.
"Not established" means the reviewed information did not establish the requested detail; it does not mean the supplier lacks the capability or documentation.
| Manufacturer or supplier | Main sourcing focus | Published capacity information | Published bathtub MOQ | Certification visibility |
|---|---|---|---|---|
| Jiaxing Miluo Smart Home Co., Ltd. | Customized bathroom collections; solid surface and resin-stone products | Bathtub-specific monthly output not established | Confirm by model and customization level | Certificate section appears on website; current model scope requires verification |
| KingKonree | Solid surface bathtubs and coordinated sanitary ware | Public profile describes a 25,000 m² facility; this is not bathtub output | Confirm directly | Company publications advertise compliance credentials; verify exact model and listing |
| Xiamen Realho Stone Co., Ltd. | Natural-stone tubs and broader stone fabrication | Quarry, factory, and export integration described; tub output not established | Confirm directly | Current bathtub-specific documentation not established |
| Apexstone Amoy Marble & Granite | Bespoke stone tubs and architectural carving | Production capabilities described; tub output not established | Confirm directly | Current bathtub-specific documentation not established |
| Xiamen Chstone Company Ltd. | Natural-stone basins, sinks, tubs, and trays | Product breadth described; tub output not established | Confirm directly | Current bathtub-specific documentation not established |
| Xiamen Mega Stone Imp & Exp Co., Ltd. | Bespoke natural-stone tubs and architectural components | Manufacturing history described; tub output not established | Confirm directly | Current bathtub-specific documentation not established |
| Quanzhou Zhenhao Stone Industrial Co., Ltd. | Customized natural-stone tubs | Tub output not established | One piece on the reviewed product listing | Current bathtub-specific documentation not established |
| Top All Group | Custom stone carving and stone bathroom products | Integrated stone resources described; tub output not established | Confirm directly | Current bathtub-specific documentation not established |
| Xiamen Asian Stone Co., Ltd. | Stone processing and custom stone products | Mining and processing integration described; tub output not established | Confirm directly | Current bathtub-specific documentation not established |
| Xiamen Oriental Stone Co., Ltd. | Architectural stone, tubs, and basins | Factory-scale claims published; bathtub throughput not established | Confirm directly | Current bathtub-specific documentation not established |
Sources for the comparison: supplier profiles, product pages, and published company information. KingKonree's facility size and advertised credentials are supplier claims, not findings from an independent factory audit.
- Establishment: Company profile traces operations to 1999; the Miluo brand launched in 2005.
- Location: Jiaxing, Zhejiang.
- Published markets: United States, United Kingdom, Canada, Australia, and the Middle East.
- Relevant products: Bathtubs, basins, vanities, solid surface, and resin-stone bathroom products.
Miluo is worth evaluating when the purchasing objective extends beyond a single statement bathtub to a coordinated, customizable bathroom collection. Its published positioning emphasizes research and development, tailored product solutions, communication throughout development, and support after delivery.
For small and medium-sized bathroom brands, this makes Miluo a relevant candidate for an OEM/ODM discussion covering product appearance, finishes, coordinated ranges, and project-specific requirements. Its potential value lies in development flexibility and supplier coordination rather than an unsupported claim of being the cheapest factory.
Before nomination, ask Miluo to distinguish its natural-marble and manufactured-material offerings, document customization boundaries, and quote tooling, samples, packaging, and repeat-order quantities separately. Published information does not establish a guaranteed response time, low MOQ, or independently measured cost advantage.
- Establishment: 2000.
- Location: China-based operation with a Shenzhen business address.
- Published market orientation: International exports and hospitality projects.
- Relevant products: Solid surface bathtubs, basins, countertops, sheets, and customized fabrications.
KingKonree is a relevant option for brands seeking a coordinated solid surface product platform rather than exclusively natural marble. Its range allows buyers to explore tubs alongside related bathroom components, which may simplify material and finish coordination. The company also publishes hospitality project experience.
Its customization offering suits discussions about proprietary shapes and integrated bathroom specifications. However, project references, facility size, and shipment claims should not replace verification of available production slots or model-specific compliance documentation.
The purchasing priority is to confirm material formulation, finish consistency, drawing ownership, and whether a proposed marble effect is integral to the material or applied as a surface treatment.
- Establishment: Exact legal incorporation date should be verified; the official website states that quarry-resource development began in 1997.
- Location: Xiamen, Fujian.
- Published markets: Company-associated information identifies customers across North America, Europe, Asia, and the Middle East.
- Relevant products: Marble, granite, quartz, architectural stone, and natural-stone bathtubs.
Realho's principal attraction is its published integration of quarry resources, processing, and exporting. Its bathtub offering includes marble and other natural-stone materials, making it relevant for buyers who want genuine stone rather than a manufactured substitute.
The strongest fit is likely to be a project requiring coordinated stone procurement: a bathtub, vanity surfaces, flooring, or additional architectural components.
For custom orders, establish which operations occur in-house, identify the actual production facility, and require approval of the selected block. Avoid using the start of quarry activity as an unqualified legal founding date.
- Establishment: 2004.
- Location: Xiamen, Fujian.
- Published market coverage: 42 countries and regions; destination-by-destination sales proportions are not disclosed.
- Relevant services: Solid-stone tubs and sinks, decorative carving, architectural fabrication, and shop drawings.
Apexstone is particularly relevant for drawing-led projects. Its company profile describes a drafting team that develops shop drawings from client plans and identifies design discrepancies. It also lists solid-stone bathtubs and sinks among its carved products.
That combination may suit architects, hospitality contractors, and bathroom brands developing distinctive stone pieces rather than selecting only from standard molds.
Buyers should request bathtub-specific inspection records. The company's published statement about individual slab inspection does not, by itself, establish a finished-tub leak-testing procedure or structural acceptance standard.
- Establishment: 2008, according to its company profile.
- Operating identity: The website also references Quanzhou Huilei.
- Published markets: United States, Canada, United Kingdom, Australia, Germany, France, New Zealand, UAE, Singapore, and Israel.
- Relevant products: Natural-stone basins, sinks, bathtubs, and trays under the STONEBATHSINK brand.
Chstone offers a bathroom-oriented natural-stone portfolio rather than only general construction stone. Its company profile describes products made from granite, marble, sandstone, travertine, and limestone, together with customization options.
This makes it a candidate for importers building coordinated stone bathroom ranges.
One due-diligence priority is contractual identity. Confirm the relationship between the trading name, manufacturing operation, certificate holder, invoice issuer, and payment beneficiary. Custom design support should also be distinguished from a fully documented ODM development service.
- Establishment: Its website describes a supporting factory established in the 1990s; the exact founding year of the exporting entity is not established.
- Manufacturing focus: Shuitou-area bespoke stone fabrication.
- Published market references: United States and UAE appear in its architectural-product information; bathtub-specific market distribution is not disclosed.
- Relevant products: Stone tubs, curved panels, carvings, and architectural stone components.
Mega Stone is relevant to buyers seeking custom stone geometry and coordination with broader architectural work. Its published portfolio combines bathtub manufacturing with curved and irregular stone fabrication.
For bespoke OEM-style production, ask for a bathtub-specific portfolio showing internal finishing, drain machining, base construction, and completed packaging—not just exterior photographs.
The factory's historical experience should be assessed separately from the exporter's legal history and the experience of the team assigned to your order.
- Establishment: 2001.
- Location: Quanzhou, Fujian.
- Published markets: Japan, Belgium, United States, Germany, South Africa, Mexico, and Australia.
- Relevant services: Customized natural-stone tubs with choices of material, size, shape, edge treatment, carving, and inlay.
Zhenhao is notable for publishing a one-piece minimum order on the reviewed natural-stone bathtub listing. This is useful for buyers exploring a project sample or a single bespoke installation, although the applicable stone and design must still be confirmed.
Its stated customization scope fits made-to-drawing procurement.
The important commercial distinction is between a one-piece order and a fully validated new design. A low quantity threshold does not automatically include engineering development, testing, special tooling, or replacement material availability.
- Establishment: 2006.
- Business structure: Includes Top Sculpture and Top Stone operations.
- Published markets: United States, European markets, Canada, Australia, Japan, and Brazil.
- Relevant services: Custom stone products, carving, project advice, technical drawings, and natural-stone bathtub listings.
Top All Group is relevant where carving and broader stone fabrication are central to the purchase. Its profile describes block and slab resources, stone-processing equipment, and inspection from cutting through packaging.
Its suitability should be evaluated against the proposed tub design rather than general carving experience alone.
Ask for evidence of previous bathtub production, including interior geometry, drain-seat finishing, filling inspections, and crate design. Confirm which group entity owns the factory and which entity accepts the contractual warranty.
- Establishment: Its website states production activity since 2007.
- Location: Xiamen, Fujian.
- Published markets: Europe, United States, Southeast Asia, Taiwan, and domestic China.
- Relevant capabilities: Mining, block processing, modeling design, and stone-product supply; a supplier directory lists block-carved stone tubs.
Asian Stone is a potential candidate for buyers prioritizing material sourcing and customized natural-stone processing.
Its own website establishes broader stone-processing capabilities, while the reviewed directory provides the more explicit bathtub description. That difference warrants a focused qualification step before treating the company as a specialist bathtub factory.
Request recent production photographs, bathtub drawings, references where available, and confirmation of whether carving and finishing are performed in-house. Do not assume that a broad stone catalog establishes routine bathtub production.
- Establishment: 2015 for the company; its website separately claims a longer factory history.
- Location: Shuitou, Fujian.
- Published market orientation: Domestic and overseas projects; leading export destinations are not specified.
- Relevant products: Architectural stone, bathtubs, basins, carvings, and project-related fabrication.
Oriental Stone may suit buyers combining a bathtub order with a wider architectural stone package. Its published offering includes engineering design and technical consulting alongside production capabilities.
However, the reviewed homepage contains inconsistent factory-scale presentation and unrelated template text. These are documentation-quality concerns rather than proof of poor manufacturing, but they make independent verification particularly important.
Before proceeding, confirm current facilities, equipment, bathtub references, and available capacity through a live walkthrough or third-party visit.
Avoid relying on descriptions such as "premium marble" or "Grade A stone" without an agreed definition.
For natural stone, make the following part of your proposed purchase specification:
- Stone name and approved material reference.
- Block identification and photographic approval.
- Permitted color and veining variation.
- Acceptance limits for fissures, filled areas, and visible repairs.
- Agreed wall, rim, and base dimensions.
- Surface finish and approved cleaning instructions.
For manufactured materials, request a written construction description, finish specification, approved color sample, and repair procedure. If formulation details are commercially confidential, agree on measurable acceptance requirements rather than accepting an undefined material name.
These are proposed purchasing controls, not a universal grading system.
A management-system certificate does not establish that a particular tub complies with destination-market product requirements.
For European purchasing, EN 14516 is a relevant domestic-bath performance standard covering characteristics such as cleanability and durability. Buyers should confirm the applicable edition and the relevant market-access documentation rather than assuming that any laboratory report establishes a complete compliance pathway. Published standards information distinguishes between current editions and harmonization status.
Likewise, RoHS concerns restrictions on hazardous substances in electrical and electronic equipment. It should not be presented as a universal environmental certification for a passive marble soaking tub. A tub incorporating electrical functions requires a separate assessment of the applicable rules.
Request documentation tied to the exact model, material, configuration, and manufacturing entity.
For your capacity assessment, ask suppliers to separate:
1. Total sanitary-ware output.
2. Bathtub output.
3. Output for the material and process you intend to buy.
4. Capacity already committed to existing customers.
5. Available production slots for your delivery window.
A large workshop can still have a narrow bottleneck in carving, polishing, curing, inspection, or packing. Treat facility size as background information, not a delivery guarantee.
Build a qualification file containing:
- Business registration and exact legal name.
- Factory address and manufacturing-site identification.
- Live walkthrough or independent inspection.
- Disclosure of subcontracted processes.
- Recent examples of comparable bathtub production.
- Current certificates and applicable product reports.
- Written warranty and claims procedure.
Where the exporter and factory are different entities, document their responsibilities in the contract. A trading company can still be a useful partner, but the relationship should be transparent.
For a new supplier or design, use a staged approval process:
1. Approve the written material and construction specification.
2. Review drawings, dimensions, drainage, and installation interfaces.
3. Approve material and finish samples.
4. Inspect the first full-size unit.
5. Record agreed dimensional, appearance, and functional checks.
6. Approve packaging and handling arrangements.
7. Release repeat production against the signed approval record.
For natural marble, use the approved sample as a finish reference, not as a promise of identical veining on every tub. Require photographs of the actual selected material before carving.
Require quotations to separate the bathtub, development work, packing, inland transport, freight-related services, and inspection costs.
Before shipment, confirm:
- Net and gross weight.
- Crate dimensions.
- Lifting and handling instructions.
- Site access and unloading arrangements.
- Drain compatibility and installation clearances.
- Insurance scope and damage-claim evidence requirements.
The cheapest factory quotation can become the most expensive purchase if the crate cannot be unloaded safely or a replacement misses the installation program.
A less-discussed risk is signing off a polished exterior without documenting how the tub is constructed.
For a natural-stone order, ask the supplier to declare whether the tub is carved from one block, assembled from components, or contains filled and repaired areas. For a manufactured product, ask whether the decorative appearance is integral or surface-applied.
A practical contract schedule should require:
- Construction disclosure before production.
- Approval of repairs outside agreed limits.
- Photographs before final finishing where relevant.
- Traceable inspection records for the finished unit.
- Written agreement on concealed areas and drain-seat acceptance.
This is a risk-control recommendation, not evidence that any supplier listed here uses undisclosed construction methods. Its purpose is to prevent an appearance sample from becoming the only definition of product quality.
The strongest sourcing decision starts by separating genuine carved marble from manufactured marble-style and solid surface products.
Natural-stone specialists merit attention when material character, carving, and architectural coordination drive the project. Manufactured-material suppliers become relevant when repeatable finishes, coordinated collections, and brand-specific product development are the priority.
Jiaxing Miluo Smart Home Co., Ltd. is a relevant candidate for brands exploring customized bathroom collections and OEM/ODM collaboration, supported by its published emphasis on development, tailored solutions, communication, and export markets. Its exact material options, order quantities, capacity, and compliance scope should be confirmed against the proposed model.
To begin a focused sourcing discussion with Miluo, send your target market, intended material, drawings or dimensions, finish reference, estimated annual volume, and required documentation. Request a quotation that separates samples, customization, packaging, inspection, and repeat-production terms.
Search the company name or certificate number through IAF CertSearch and review the current status, scope, issuing body, and covered locations. Its verification guidance distinguishes active, suspended, withdrawn, and expired certificates.
Match the certificate holder to the manufacturing entity. If a record is missing or details conflict, contact the issuing certification body directly before drawing a conclusion. Do not rely only on an expiry date printed on a PDF.
No single document should be treated as automatic approval.
Ask which requirements apply to the exact product, which technical standard and edition were used, what the report actually tested, and what manufacturer declarations are required. EN 14516 concerns domestic baths, but standards currency and harmonization status require separate attention.
Have the importer or a qualified compliance specialist review the complete file before placing the product on the market.
Sometimes, but the sample order and production program may have different commercial conditions.
Zhenhao publishes a one-piece MOQ on the reviewed bathtub page. That does not establish the same condition for every stone, design, or other supplier.
Request separate quotations for a sample, an initial production batch, and repeat orders. State who owns any drawings or tooling and whether development charges are credited against future orders.
Make material identity part of the purchase order rather than leaving it in informal messages.
Include the approved specification, finish reference, construction method, permitted variations, and inspection rights. For natural stone, add actual-block approval. For manufactured products, establish traceable batches and measurable acceptance criteria where practicable.
Require written approval for any material or process change before production continues.
Allocate responsibility before shipment.
The contract should address manufacturing defects, packaging adequacy, transit damage, unloading damage, insurance claims, and the evidence needed to distinguish them. Record the condition of the product before crating and document unloading and unpacking on arrival.
Agree in advance whether an accepted claim results in repair support, replacement, credit, or another remedy—and whether associated freight costs are included.
1. China Stone Material Association industry portal — 2025 China stone import and export report listing. [chinastone]
2. StoneNews — Coverage of the 2025 China Stone Import & Export Trade Report, including export volume and category context. [stonenews]
3. General Administration of Customs of China — Official 2025 major export statistics. These broad tables are not a dedicated marble-bathtub market report. [english.customs.gov]
4. European Commission — RoHS Directive scope and restricted substances. [environment.ec.europa]
5. IAF CertSearch — Certificate-search and verification guidance. [iafcertsearch]
6. British Standards Institution publication information via NBS — BS EN 14516:2015+A1:2018. [thenbs]
7. Czech technical-standards information portal — EN 14516 edition and harmonization-status information. [nlfnorm]
8. Jiaxing Miluo Smart Home Co., Ltd. — Company profile, history, products, and markets. [china-miluo]
9. KingKonree — Official product and company information. [kingkonree]
10. Realho Stone — Company information and natural-stone bathtub offering. [top-marble-granite]
11. Apexstone Amoy Marble & Granite — Company history, drafting services, and carved-stone products. [apexstone]
12. Xiamen Chstone — Company history, products, and market information. [stonebathsink]
13. Mega Stone — Manufacturing background and stone bathtub range. [megastoneglobal]
14. Quanzhou Zhenhao Stone Industrial — Customized bathtub listing, MOQ, history, and markets. [abdstone]
15. Top All Group — Company profile and natural-stone bathtub listing. [topallgroup]
16. Xiamen Asian Stone — Official company information and supplementary bathtub directory listing. [stonein]
17. Xiamen Oriental Stone — Company history, product scope, and manufacturing claims. [xmoriental-stone]
