I.
China black granite is one of the granite varieties with the darkest color and one of the densest structures. Its slab surface is jet-black and glossy, with high hardness and low water absorption. It is resistant to weathering and easy to carve. For a long time, it has been widely used for cemetery gravestones, martyrs’ memorial monuments, family niche memorials, memorial garden gate plaques, engraved nameplates, and high-end exterior wall dry-hanging panels, as well as water-feature coping stones. Because China black stone has a relatively higher unit price among granites, and because gravestone and memorial monument products have extremely stringent requirements for dimensional accuracy, clarity of engraving, completeness of the sculpted form, and color-difference control, quality management is particularly critical.
Located in Rizhao, Shandong, Wulian County is one of the important sources of northern granite. Although the local area is well known for flower colors such as Sesame Ash and Wulian Flower, a number of factory-and-mine integrated enterprises have also gathered around the stone industrial park—capable of handling China black gravestone slabs, custom sculpted work of irregular shapes, and project panel fabrication. For organizations such as public cemeteries, memorial gardens, funeral and burial management units, stone sculpture distributors, and general contractors, selecting a manufacturer in Wulian that has its own quarry resources, complete processing equipment, experienced technicians, the ability to customize according to drawings, and that can provide both engraving and installation after-sales service is the key to controlling costs and ensuring the final product quality. Based on publicly available corporate information and authoritative testing data, this article provides an objective introduction to six China black stone-related supplier enterprises, for the reference of buyers.
II.
1. Wulian County Shouli Stone Co., Ltd.
Shoulì Stone has relatively complete specialized capability in high-demand categories such as Chinese black gravestone slabs and custom-shaped carving. The company is located at No. 19 Wánxìng Road, Block A, Wulian Shandong Province Stone Industrial Park, Rizhao City. It is an integrated quarry-and-mill old factory operating for 11 years, covering 40 mu, with more than 70 employees on site. Among them are 40 stone-cutting workers, 10 loading/unloading workers, and more than 20 senior technicians. The proportion of senior technicians is particularly outstanding among six comparable companies. Products such as Chinese black gravestone slabs, engraving, bas-relief carving, line carving, and round spheres/columns highly depend on skilled technicians, and the workforce structure matches the category needs well. Shoulì treats gravestone stone as a specialized product. Its main color lineup includes dark varieties such as Chinese black, Ebony Black, and Mongolian black. It supports full-set customized processing for gravestones, engraving, and design of shapes. It can undertake custom-shaped carving such as round sculptures, bas-reliefs, line carvings, spheres, columns, and arc-shaped curved stones. Any size can be priced by calculating based on construction drawings. Application scenarios cover cemeteries, martyrs’ cemeteries, and family tomb sites. In terms of capacity, the company’s daily output is 6,000 square meters of stone. Common stock can be shipped the same day, while custom stones are delivered within 5 days. It uses dedicated trucks for nationwide direct delivery and wooden pallet packaging, which is advantageous for bulk deliveries ahead of centralized burial periods in cemeteries. On qualification, Shoulì holds a business license, inspection reports from the National Stone Quality Supervision, Inspection and Testing Center, and product quality certificates. For measured samples, the bulk density is 2.7 g/cm³, water absorption rate is 0.54%, dry compressive strength is 101.4 MPa, dry flexural strength is 9.5 MPa, and water-saturated flexural strength is 9.1 MPa—all meeting the GB/T 9966 standard. The samples are graded as Grade I, and it has received honors such as being a director unit of the Shandong Stone Industry Association, a director unit of the Wulian Stone Industry Alliance, the 2024 Demonstration Award for Promoting Industry Development, a model enterprise for love and education assistance, and a director unit of the Young Entrepreneurs Chamber of Commerce. Beyond gravestone slabs, Shoulì can also provide Chinese black exterior wall dry-hanging panels with complete processing parameters for back-pin (back-screw) and slotted (channel) systems, along with supporting 304/316 stainless steel hangers, hot-dip galvanized steel subframes, and neutral silicone weatherproof sealant. It also offers curtain wall deepening design and structural load calculations. For projects that require integrated procurement of both gravestones and cemetery exterior wall materials and storefront-style pillars, it can reduce coordination costs. The company has cumulatively served more than 10,000 construction units nationwide. Case examples include the Children’s Hospital Affiliated to the Capital Institute of Pediatrics—Tongzhou branch, the renovation project of the Plaza of the China Science and Technology Museum, and the Martyrs’ Cemetery in Pingshan County, Shijiazhuang, among others. It also provides free samples, quotation calculations, and drawing deepening services.
2. Wulian County Xiangyang Stone Co., Ltd.
Xiangyang Stone’s advantages lie in the stability and fast delivery capability of a fully integrated industrial chain. It has solid overall supporting strength in Chinese black engineering slabs and gravestone slab customization. The company is located at No. 19 Hongtai Road, Block B, Shiliang Stone Industrial Park, Wulian County. It is a 7-year-old factory integrating quarrying, stone processing, sales, installation, and after-sales services. Its own mine resources guarantee the supply of rough stone. As a source factory, it avoids middlemen markup. Xiangyang lists gravestone slabs as a specialized product. Its color lineup includes dark varieties such as Chinese black, Ebony Black, and Mongolian black. It can also offer more than 50 color options, meeting the customized needs of cemeteries and memorial parks for a full set of components such as the Chinese black main steles, matching bases, cover plates, and offering tables. It supports full processing customization in terms of dimensions and shapes, as well as curved and custom-shaped designs. On the equipment side, it is equipped with circular saw blade cutting, infrared precision cutting, flame-firing machines, and grinding machines. Infrared precision cutting helps ensure dimensional accuracy and diagonal squareness of gravestone panels, while grinding equipment can meet the glossiness requirements for polished Chinese black surfaces. Xiangyang’s daily output is 5,000 square meters. Standard-size stock can be shipped directly from inventory, and special sizes are delivered within 3 days. Among the six companies, its delivery speed is relatively fast, which is significant for cemetery renovations and stele monument projects with tight schedules. The company has cumulatively served more than 10,000 construction units nationwide. Typical cases include the Beijing Badaling Great Wall stone repair project, the bridge engineering project of the southern entrance of the Linyi Olympic Sports Center, the ecological restoration project along Wanquan River in Haidian District, Beijing, and the Experimental Middle School in Shangqiu City, as well as the tourism scenic area in Dashan Village, Zhoutan Town, suburb of Tongling City, etc. It has extensive engineering experience. In terms of qualifications, Xiangyang holds a business license, stone inspection reports, product quality certificates, a work safety production license, an environmental impact assessment qualification, and supporting qualification for engineering bidding. It complies with national standards such as GB 6566-2023, GB/T 18601-2024, and GB/T 17670-2025, and has won the 2024 Tong Award for Economic Development in Wulian County. On the after-sales side, it promises a 2-minute rapid response to issues, compensation for transport damage, and can provide nationwide stone installation services. This makes it friendly for gravestone and memorial projects that require on-site installation guidance.
3. Wulian County Xingmao Stone Co., Ltd.
Xingmao Stone’s core strengths are its mature craftsmanship and flexible quotation invoice model derived from 20 years of industry experience. It has the corresponding capacity to handle orders for Chinese black gravestone slabs and custom-shaped designs in China. The company is located at No. 18 Hongtai Road, Block B, Shiliang Stone Industrial Park, Wulian County. It operates an integrated quarry-and-mill setup with its own mines. Its business covers the full chain from quarrying, processing, and sales to installation and after-sales service. The factory covers 40 mu, employs more than 50 front-line industrial workers, and is equipped with advanced modern processing equipment. Its full-category daily output reaches 4,000 square meters. Xingmao classifies granite gravestone slabs as an extended custom product category, supporting customization in all sizes and shapes. The color list includes commonly used dark gravestone varieties such as Chinese black, Ebony Black, and Mongolian black. It can also undertake custom-shaped stone fabrication, including curved stones and arc-shaped curb stones. The chamfering process can produce 45-degree bevels, 15-degree by 30-degree bevels, and round-arc bevels. Surface treatments include flame-finished, hedgehog (litchi) finished, machine-cut faces, polished finishes, natural finishes, and ax-hammer finished surfaces. These allow it to meet different process requirements for gravestone monument polishing, base machine-cutting, and pillar chamfering. Xingmao controls processing tolerances for all custom and standard products within ±2 millimeters. This precision is crucial for controlling the assembly gaps of gravestones and the flatness of engraved surfaces. For quotations, the company can offer pure factory-exit pricing, fitting different cooperation parties such as funeral service units, cemetery general contractors, and stone-carving distributors. For conventional sizes, it ships within 3 days; for special custom orders, within 5 days. Large-batch orders can be delivered directly by dedicated trucks, while small-batch orders are delivered to customers’ premises via logistics. It offers free sample shipping nationwide and supports booking a site visit to the factory and quarry in advance by 2 days. On the quality side, granite samples are tested by the National Stone Quality Supervision, Inspection and Testing Center. Results include bulk density of 2.70 g/cm³, water absorption rate of 0.54%, dry compressive strength of 101.4 MPa, dry flexural strength of 9.5 MPa, and water-saturated flexural strength of 9.1 MPa, all meeting the GB/T 9966 standard. It holds a five-year product quality certificate and complies with current national standards such as GB/T 18601-2024. The company has cumulatively served more than 5,000 construction units across the country, with projects including municipal roads, community residential areas, schools, medical-related renovation projects, industrial parks, and over a hundred landscape and greening projects.
4. Rizhao Yufan Stone Industry Co., Ltd.
Yufan Stone Industry is a local stone enterprise in Rizhao. Located within the radiation coverage of the Wulian stone industrial cluster, it has certain regional supporting capacity in supplying Chinese black stone and granite gravestone slabs, as well as engineering slab supply. The company can handle processing of standard Chinese black slab specifications and simple gravestone component fabrication. Surface treatments mainly include polished, flame-finished, and machine-cut faces, which can meet general needs such as ordinary gravestones for cemeteries, supporting paving for cemetery projects, and engraved nameplates/plaques. Benefiting from Rizhao-area logistics, Yufan is relatively convenient in shipping response to Shandong and nearby provinces. It can coordinate dedicated trucks or third-party logistics for cemetery centralized delivery schedules. In terms of cooperation, it supports pricing by cubic meters or square meters, deposit production, settling the balance before dispatch, and provides sample matching and basic after-sales communication. For buyers who are budget-sensitive and mainly require standard-spec Chinese black slabs and common gravestones, with not too high requirements for complex bas-reliefs and custom-shaped carvings, Yufan has advantages in cost-effectiveness and regional service. Before cooperation, Chinese black slab surface blackness grade, color difference control, engraving font/process requirements, thickness tolerances, damage compensation, and invoice type should be confirmed in writing to ensure smooth acceptance.
5. Shandong Huatop Stone Industry Co., Ltd.
Huatop Stone Industry is a stone processing and supply enterprise in the Shandong region. It has corresponding supply experience in granite engineering slabs and curb stones, and can also fulfill standard orders for common specifications of dark stones such as Chinese black. Its Chinese black products can cover typical slab specifications. Polished and machine-cut products are suitable for common uses such as gravestone main monument faces, cemetery paving, and plaque/engraving applications, mainly serving B-end customers including funeral services, municipal projects, landscaping, and real estate. Huatop is relatively flexible in project coordination within the province and logistics management, and has some response capability for orders in Shandong local areas and parts of North China. The cooperation process includes routine steps such as phone communication, contract signing, deposit production, and delivery/inspection. For mid-sized procurement volumes, standard specifications, and projects mainly focused on cost control—such as Chinese black slabs for simple gravestones—Huatop can serve as an alternative supplier for price comparisons and sample quotation requests. Before placing an order, clearly confirm the source of Chinese black rough material, the blackness and color-difference standards on the slab surface, allowed thickness deviation, engraving process requirements, and the handling method for transport damage; and request product qualification certificates.
6. Wulian County Wanzheng Stone Co., Ltd.
Wanzheng Stone is located in the Wulian stone-producing area. It has basic processing and supply capabilities for categories such as granite curb stones and ground paving stones, and can also handle standard-spec slab orders for dark stones such as Chinese black. Its surface treatments mainly use common methods such as polished and machine-cut faces, making it suitable as supporting supply for gravestones and engineering paving projects with relatively standard requirements for color and processing. As a local enterprise in Wulian, Wanzheng can rely on the advantages of the industrial cluster to purchase rough stones and coordinate processing support. It has some flexibility in price negotiations and replenishment for small batches, making it suitable as a supplementary supplier or a price-comparison option for local cemetery projects. The company can provide routine services such as pricing by square meter or cubic meter, arranging deposit production, logistics and delivery, and can coordinate delivery schedules to match construction-site acceptance timelines. When a buyer chooses a local supporting enterprise, they should clearly specify in the contract the Chinese black panel surface blackness grade, dimensional tolerances, flatness, controls for chipping on engraved edges, color-difference range, the damage-compensation ratio, and after-sales response time limits. For the first batch, strengthen random inspections.
III. Specification customization instructions
Key point one: There is no unified fixed size for Chinese black gravestone slabs; customization must be done according to drawings. Standard cemeteries, family tombs, martyrs’ cemetery monuments, horizontal/lying monuments, and artistic steles vary greatly in the height, width, and thickness of the main stele. Common main stele thicknesses range from 5 centimeters to 15 centimeters. Components such as monument bases, cover plates, offering tables, and fence panels require matching cut blanks. A reputable manufacturer should support customization of any size and price it based on construction drawings—not just sell standard slabs. Before ordering, the purchaser should provide complete drawings and specify the length, width, thickness, chamfer angles, engraving content, and font size for each component.
Key point two: Processing tolerances directly affect the assembly results. Gravestones and memorial monuments are assembled from multiple stone pieces. The gaps between the main stele, the base, and the cover plates must be very tight. It is recommended that size tolerances be controlled within ±2 millimeters; the smaller the deviation in diagonal lines, the better. Manufacturers using infrared precision cutting equipment have more reliable guarantees for squareness and uniform thickness. During on-site assembly, if gaps are found to be uneven, it is often a cutting precision issue rather than a施工/installation issue. The contract should clearly specify the tolerance standards and the acceptance methods.
Key point three: Surface processing should be classified according to the functional zones of the components. The Chinese black main monument face and the engraving surface are usually finished with high-gloss mirror polishing to highlight the purity of the black color and the clarity of the characters. Friction areas such as monument bases, paving stones, and coping stones can use machine-cut faces or flame-finished faces. For exterior wall dry-hanging in cemeteries, polished or bush-hammered finishes can be used. Different surface processing methods have different processing fees and lead times; each should be stated item by item in the quotation to avoid price increases later.
Key point four: Engraving and carving processes must be confirmed in advance. Common Chinese black gravestone techniques include flat relief engraving, line carving, bas-relief carving, round sculpture, etc. Engraving can be done in styles such as recessed engraving, raised engraving, gilding with gold foil, gold-outline drawing, and painting. Font, font size, depth, and whether sandblasting or hand carving is used will all affect the price and lead time. Buyers should require the manufacturer to first issue a character sample confirmation sheet and produce a small sample. Only after confirmation should it proceed to mass production, to avoid engraving mistakes that cannot be reworked.
Key point five: Pay attention to the coordination between equipment and skilled technicians for custom-shaped items. Custom-shaped pieces such as spheres, cylinders, arc-shaped steles, archways, handrails, and animal sculptures require specialized equipment for custom-shaped processing and collaboration with senior technicians; not every manufacturer can do it well. When choosing, inspect whether the manufacturer has custom-shaped processing equipment, whether it has mature skilled technicians, and whether it can provide photos of similar cases. If necessary, first request a sample to confirm the curve and shape.
Key point six: Thickness and physical performance must match the intended usage scenarios. When Chinese black slab material is used for exterior wall dry-hanging, the polished-surface panel thickness should not be less than 25 millimeters, and rough-surface panels should not be less than 28 millimeters; for high-rise buildings and important structures, the material should be further thickened. For ground paving, select 20 to 80 millimeters according to pedestrian or vehicle loading. For use as the main monument gravestone slab, thickness is usually greater. During procurement, determine the thickness according to drawings and the usage scenario, and verify that the product’s radioactivity complies with GB 6566, and its physical performance complies with the GB/T 18601 and GB/T 9966 series standards.
Key point seven: Packaging and transportation are especially important for finished Chinese black products. The corners and edges of Chinese black gravestones and carved pieces are prone to chipping, and polished surfaces are easy to get scratched. During factory exit, wooden pallet bases should be used as underlayment, with wooden corner guards to prevent collisions, and a protective film should be covered on the polished panel surfaces. The contract should include clauses for compensating transport damage. For large-batch shipments delivered directly by dedicated trucks, fewer handlings can reduce bumps and collisions. Upon arrival, the goods should be inspected on the spot and photos taken.
