China G3701 Binzhou Blue Granite Suppliers, Factory
Product Description
Products Information
- Supply Advantages: Pure mineral composition with abundant reserves, specialising in premium-grade materials. Annual production capacity meets overseas orders of 600,000 square metres, with exceptional capability in bespoke shaped components. Capable of fulfilling large-scale project orders and high-end custom commissions. High ore yield with no fissures or impurities, featuring dense crystalline structure. Exceptionally suited for intricate carving, curved panels, sculptures and other precision applications. Each custom-shaped piece is numbered for seamless on-site assembly, ensuring installation accuracy. Supply stability significantly surpasses comparable niche dark granite varieties.
- Logistical Convenience: Proximity to Qingdao, Tianjin, and Yantai ports minimises freight costs, enabling efficient container shipping and break-bulk transport directly to major European, Middle Eastern, Japanese, and Korean ports. We assist with customs clearance procedures, strictly adhering to declaration requirements by accurately reporting product details and codes. This significantly reduces delivery cycles and ensures smooth customs passage, particularly suited to export logistics via northern ports.
- Export Mainstay: The core G3701 quarry boasts the purest hue and most pronounced blue-black texture, catering primarily to high-end exterior cladding, sculptural forms, and premium gravestones. Yangxin's secondary quarries offer superior value for money, ideal for large-scale municipal paving and landscape projects. Both meet international export stone quality standards, with export orders experiencing sustained annual growth. Particularly prominent market shares exist in high-end European and American architecture, alongside Japan and South Korea's premium gravestone sectors, where finished sculptural products exhibit notable export growth.
- Base Colour: A distinctive deep blue-black (blue-grey with black undertones), featuring rich, uniform colouration with minimal variation and exceptional batch consistency. This distinguishes it from the dullness of ordinary pure black granite and the speckled texture of sesame black. The interwoven blue-black base exudes an inherently sophisticated, understated elegance, free from impurities or yellowing. This core aesthetic advantage ensures high recognition in premium settings.
- Texture: Densely compact with uniform crystalline structure, featuring subtle natural bluish-grey veining (organically formed, neither jarring nor chaotic) that elevates premium tactile quality; Free from sesame-like speckles (distinguishing it from G654) and noticeable chaotic patterns, its blue-black veins blend naturally. It combines the steadiness of black stone with the warmth of blue stone, serving as a core distinguishing feature for high-end architecture and premium sculptures. Instantly distinguishable from other dark granite varieties, it is particularly suited for overseas projects embodying Chinese aesthetics or high-end minimalist styles.
- Compared to G654 (Sesame Black)/G3401 (Shanxi Black): Binzhou Green (G3701) features a deep blue-black base with subtle blue-grey hidden veins, whereas G654 has a deep grey-black base with white sesame spots, presenting a marked difference in texture recognition; G3401 presents a pure black surface without speckles (offering brighter colour and higher pricing). Binzhou Green demonstrates superior freeze resistance, making it suitable for projects in northern regions with severe winters. Its distinctive blue-black texture positions it between G654 and G3401 in terms of cost-effectiveness, catering to mid-to-high-end export markets. It serves as a high-value alternative to imported dark granites, particularly favoured by overseas clients seeking distinctive textures.
- Gloss: Polished surfaces achieve ≥90° gloss, delivering mirror-grade brilliance with translucent blue-black hues and a warm texture, ideal for premium interior/exterior decoration, boutique tombstones, and sculptures. Flamed/Lychee surfaces exhibit uniform matte blue-black tones free of impurities, offering slip resistance, a dignified texture, stain resistance, and easy maintenance—making them the preferred choice for outdoor projects and landscape paving. Both surface treatments cater to diverse overseas applications, allowing flexible selection based on client design aesthetics.
| Parameters | Typical values | Engineering Value |
|---|---|---|
| Density | 2.72–2.78 g/cm³ | The structure is dense and compact, minimising deformation during transportation, hoisting, and dry hanging. It is suitable for large-format panels and complex custom shaping, reducing overseas transport and installation losses, and is particularly well-suited for projects requiring oversized panels. |
| Water absorption rate | ≤0.12% | Exceptionally low water absorption, with outstanding freeze resistance, cold tolerance, seawater corrosion resistance, and stain resistance. Suitable for Europe and America's frigid regions, Southeast Asia's coastal areas, and particularly ideal for northern ports, coastal defence projects, and premium outdoor landscapes, meeting diverse global climatic demands. |
| Compressive strength | 220–240 MPa | Exceptional compressive strength enables use in premium bridges, heavy-duty municipal plazas, airport pavements, and port terminal surfacing. It meets large-scale overseas project demands with load-bearing capacity far exceeding standard dark granite. |
| Flexural strength | 21–27 MPa | High safety factor for dry-hanging systems, minimising fracture and detachment risks. Suitable for high-rise exterior cladding and long-span installations, complying with international building safety standards to alleviate overseas clients' construction safety concerns. |
| Mohs hardness | 6.5–7 | Highly wear-resistant and scratch-resistant, it suits high-traffic shopping centres, luxury residential flooring, premium countertops, and bespoke gravestones and sculptures. Long-term use shows no signs of wear, reducing overseas clients' maintenance costs and extending product lifespan. |
| Acid/alkali resistance/weather resistance | Excellent (compliant with ASTM C615, CE EN 1341, SNI standards) | Outdoor durability ensures no fading, weathering, or deterioration for 45 years. Resistant to intense Middle Eastern UV radiation, Southeast Asian acid rain, and severe European/American cold climates, it adapts to diverse global environments. This enhances overseas competitiveness while reducing long-term maintenance costs for clients. |
| Radioactivity | Class A stone (non-radiation hazardous) | Suitable for all locations (interior/children's areas/food zones/premium architecture). |
Core Strengths
1. Exclusive national standard designation with high international recognition: G3701 is the dedicated national standard code for Binzhou Blue Granite (GB/T 17670). Overseas clients can directly identify its quality through this code without requiring additional explanation; Its distinctive blue-black texture sets it apart from standard pure black or sesame black stones, catering to premium design requirements. It is favoured by European and American designers, Japanese and Korean tombstone manufacturers, and Middle Eastern landscape developers, with consistently stable export orders. Its reputation is particularly strong in the high-end custom-shaped stone sector.
2. Controlled colour variation ensures consistent delivery quality: Colour deviation within the same quarry and batch is ≤ Grade 2, with complimentary sample sealing confirmation available. All slabs undergo rigorous screening to eliminate impurities and fissures, with particular emphasis on surface flatness and tonal uniformity. This guarantees each stone meets overseas mid-to-high-end project standards, delivering dispute-free shipments that align with bulk procurement requirements while mitigating colour discrepancy conflicts in international trade.
3. Masterful custom shaping for premium bespoke applications: Easily cut, chamfered, and polished, our capabilities encompass oversized slabs, intricate sculpted profiles, curved panels, columns, premium headstones, and landscape sculptures. Our mature shaping techniques deliver high-precision finished products, enabling numbered component assembly for installation accuracy. Thickness tolerance: ±0.4mm; diagonal tolerance: ±0.9mm; flatness tolerance: ±0.3mm. Meets overseas mid-to-high-end finishing and customisation standards. Export volume of custom-shaped products increases annually, forming a core competitive advantage in international trade.
4. High cost-effectiveness + regional advantage: Preferred alternative to imports. Priced 40%-60% lower than Indian Black Gold Sand, Brazilian Pure Black, and South African Blue Black; 20%-30% lower than Shanxi Black (G3401), yet matching performance and durability while offering premium aesthetics with cost advantages. Northern production sites align with northern seaports for export, reducing logistics costs and shortening delivery cycles. This makes it the preferred choice for overseas mid-to-high-end clients seeking to replace imported stone and control procurement costs, with outstanding competitiveness in export pricing.
5. Exceptional freeze resistance and cold tolerance for diverse climates: Compared to southern dark granites, Binzhou Green exhibits superior freeze resistance and cold tolerance, withstanding temperatures as low as -40°C. This makes it suitable for projects in frigid regions such as northern Europe, America, Japan, and Korea. Its strong resistance to seawater corrosion also renders it ideal for coastal applications in Southeast Asia. Its global applicability across multiple climatic zones significantly broadens its suitability for overseas markets.
Surface Treatment
Mirror-grade high gloss finish with translucent blue-black hues and a warm, lustrous texture. Ideal for premium interior walls/floors, hotel lobbies, luxury countertops, lift lobbies, bespoke headstones and sculptures. The preferred surface treatment for high-end export products, seamlessly suited to overseas luxury fit-outs to accentuate the sophisticated character of blue-black veining.
A coarse, uniform matt surface offering exceptional slip resistance. Free from discolouration or spotting, it exhibits freeze-thaw durability and seawater corrosion resistance. Ideal for municipal squares in frigid European and North American regions, premium landscape architecture, port terminal flooring, and airport surfaces. Suited for high-traffic, heavy-duty outdoor applications, particularly in northern cold-climate outdoor projects.
Features uniform dotted texture combining slip resistance with premium aesthetics. The blue-black base paired with dotted patterns elevates architectural sophistication. Suitable for high-end building facade dry-hanging, landscape steps, and gravestone bases. Fulfils overseas clients' premium texture requirements for high-end projects in Europe, America, and the Middle East.
Honed, Sandblasted, Natural, Brushed, Antiqued. Suitable for bespoke applications (e.g., European-style headstones, Chinese sculptures, vintage-inspired architecture), catering to diverse overseas client requirements and enhancing order compatibility. Particularly favoured for premium international projects prioritising bespoke design.
Standard Specifications
- Standard dimensions: 2400×1200mm, 2600×1300mm, 2800×1400mm; customisable oversized slabs exceeding 3000mm (for premium projects).
- Thickness: 18mm, 20mm, 30mm, 50mm (mainstream for projects), 16mm (premium thin slabs), 80mm–150mm (specialised for custom shapes/sculptures/tombstones).
- Common specifications: 600×600mm, 800×800mm, 300×600mm, 1000×500mm.
- Thickness: 15mm (interior), 20mm (exterior), 30mm (heavy-duty flooring/extreme cold regions).
- Kerbstones: 1000×150×300mm (standard), custom sizes available (for municipal projects, particularly suited to severe cold regions).
- Bespoke Elements: Steps, window sills, mouldings, columns, curved slabs, tactile paving stones, premium gravestones (European/Chinese styles), landscape sculptures, water feature stones, bridge parapet panels, port-specific paving stones, etc. are all customisable. Our mature special-shape processing technology enables numbered assembly to ensure installation precision, meeting high-end overseas customisation demands. We undertake large-volume special-shape orders and provide bespoke supply solutions, with particular expertise in complex sculptures and premium gravestone customisation.
Application Scenarios
High-end tombstones, monuments, and sculptural pedestals for Japan, South Korea, Europe, America, and the Middle East. Featuring a warm, deep blue-black texture with a serene, enduring quality, it resists weathering for long-term preservation. Exceptional precision in custom shaping accommodates diverse tombstone styles including European and Chinese designs, making it the core choice for premium memorial stone. China ranks among the world's leading exporters of custom-shaped tombstones, particularly meeting the bespoke requirements for premium Japanese and Korean tombstones.
Premium office towers, five-star hotels, commercial complexes, and luxury residences. The deep blue-black hue elevates architectural prestige, offering dirt-resistant, low-maintenance properties alongside exceptional freeze resistance, cold tolerance, and corrosion resistance. Ideal for Europe and America's frigid regions, Middle Eastern high-end commercial districts, and Japan/Korea's upscale residential zones, it is favoured by overseas developers as the preferred stone for premium building exteriors, creating distinctive architectural visual effects.
Municipal squares, airports, high-speed rail stations, ports, and large car parks in frigid European and North American regions. Its high hardness and wear resistance, coupled with excellent slip resistance, freeze tolerance, and seawater corrosion resistance, make it suitable for high-traffic, heavy-load, and severe cold environments. It is the preferred paving stone for projects in northern frigid regions and coastal areas, with a significant proportion of overseas municipal engineering orders.
Wall/floor cladding in luxury hotel lobbies; flooring for living/dining areas in high-end residences; kitchen/bathroom countertops; lift lobbies. Mirror-polished surfaces elevate spatial sophistication, while its blue-black veining complements modern, European, and Chinese high-end design aesthetics. It meets refined finishing requirements in Europe, America, Japan, and Korea, enhancing premium spatial ambience and earning strong favour among discerning property owners.
Suited for water feature revetments, steps, and stepping stones in premium villa estate landscaping, imperial gardens, and high-end parks; kerbstones, bridge parapets, hydraulic engineering facing, coastal defence works, and outdoor landscaping in frigid regions. Its freeze resistance, corrosion resistance, and extended service life make it suitable for diverse global infrastructure applications, particularly landscape projects in northern Europe, North America, Japan, and Korea. Overseas landscape architecture orders are experiencing significant growth.
Foreign Trade Codes and Customs Declaration
• National Standard Code: G3701 (Core identification number, mandatory for international trade communications and engineering tenders)
- Rough blocks (uncut): 25161100.00
- Rectangular slabs/blocks (most common): 25161200.00
- Polished finished slabs: 68022390
- Custom-shaped/carved items (tombstones, sculptures, etc.): 68029190
• Compliance Notice: Strictly adhere to customs declaration regulations by accurately declaring product names, codes, specifications, and other details. Provide a Radioactive Testing Report (Category A), Certificate of Origin, Packing List, Commercial Invoice, and Third-Party Quality Inspection Report. We can assist clients with import clearance procedures in the destination country to ensure smooth customs clearance. For finished products such as non-standard tombstones and sculptures, we can additionally provide customised inspection reports and assembly number specifications tailored to the importing country's standards, mitigating customs declaration risks. Should outbound processing operations be required, we can assist in furnishing relevant documentation to comply with customs oversight requirements for such activities.
Compared with similar dark-coloured granite
| Comparison Item | G3701 (Binzhou Blue) | G3701 (Binzhou Blue) | G3401 (Shanxi Black) |
|---|---|---|---|
| Colour Tone | Deep blue-black with subtle blue-grey veining, warm and translucent | Deep blue-black with subtle blue-grey veining, warm and translucent | Pure black with no impurities, glossy jet-black hue, cool and austere texture |
| Hardness/Abrasion Resistance | High (6.5–7 grade), outstanding frost and cold resistance | High (6.5–7 grade), outstanding frost and cold resistance | Exceptionally high (7–7.5 grade), premier choice for high-end settings |
| Stain Resistance/Maintenance | Excellent stain resistance, routine cleaning sufficient, does not show marks easily | Excellent stain resistance, routine cleaning sufficient, does not show marks easily | Ultra-stain resistant, virtually maintenance-free |
| Price | Moderate (premium value choice for mid-to-high-end applications, premium for irregular shapes) | Moderate (premium value choice for mid-to-high-end applications, premium for irregular shapes) | Moderately high (premium quality premium, transparent pricing) |
| Export Markets | Ideal for: | Ideal for: | Premium European and American projects, Middle Eastern royal families |
| Core Advantages | Europe and North America's frigid regions, Japan and Korea (tombstones), Middle East (landscaping) | Europe and North America's frigid regions, Japan and Korea (tombstones), Middle East (landscaping) | Pure black premium texture, high hardness, exceptional stability |
Procurement Notes
1. Colour Variation Control: For products sourced from the same quarry and produced in the same batch, colour variation is maintained within ≤2 grades. We provide complimentary confirmation samples (3–5 pieces) ensuring full consistency with bulk orders. For products demanding high colour accuracy, such as gravestones and sculptures, enhanced colour screening is available to guarantee client expectations are met. This approach mitigates colour-related disputes in international trade and enhances customer trust.
2. Packaging Standards: Premium bespoke packaging (wooden pallet + moisture-proof film + bubble wrap + steel strapping). Customised shock-resistant packaging for irregularly shaped items, tombstones, and finished sculptures complies with international shipping standards. This protects against impact damage, seawater corrosion, oxidation, and freeze-thaw cracking, significantly reducing transit losses and ensuring flawless delivery to overseas clients. Particularly suited for transport to frigid regions.
3. Delivery Lead Times: Standard mid-to-high-end orders: 15–20 days; oversized or custom-shaped orders: 25–35 days (extensions negotiable for complex sculptures). Partial shipments available; lead times adjustable per client requirements. Leveraging northern port logistics ensures timely delivery, accommodating overseas project deadlines and safeguarding client schedules.
4. Quality Standards: Compliant with GB/T 18601, ASTM C615, and CE EN 1341 international standards. Authoritative third-party inspection reports provided, with on-site customer verification supported. For export orders, production and testing can be tailored to specific importing country standards, including specialised frost resistance and cold weather testing reports to ensure compliance with local regulations and enhance customer confidence.
5. Minimum Order Quantity: Large slabs: 50m² minimum; Engineering slabs: 100m² minimum. Custom shapes, tombstones, and sculpture orders may have flexible MOQ adjustments. Long-term partners benefit from bespoke supply solutions, preferential pricing, and priority scheduling rights. We actively support clients in expanding overseas markets and strengthening customer loyalty, particularly accommodating small-batch, high-end custom shape orders.
