G20 Bengal Black Rough Granite Blocks
G20 Bengal Black Rough Granite Blocks are unfinished granite blocks quarried in Andhra Pradesh and Karnataka, India, featuring fine-to-medium-grained grey-black gabbro with uniform color. Designed for fabricators, processors, and importers requiring raw blocks for processing into slabs, tiles, monuments, and commercial flooring with exceptional durability and consistent quality.
G20 Bengal Black Rough Granite Blocks originate from West Bengal quarries where geological conditions produce this distinctive dark granite variety exhibiting prominent grey-white veining within raw block formations. These unprocessed blocks present deep black to charcoal backgrounds with dramatic linear mineral patterns visible even before fabrication begins. Dense crystalline composition featuring biotite, feldspar, and quartz minerals delivers exceptional structural integrity throughout block dimensions. Physical testing confirms superior compression strength, high density, and minimal water absorption suitable for demanding downstream applications. Indian granite block exports from Bengal regions represent established industry segment where raw material extraction quality fundamentally determines finished product success across monument, construction, and dimensional stone markets.
G20 Bengal Black Rough Granite Blocks are widely sourced to produce finished G20 Bengal Black Granite slabs and tiles with consistent density and color.
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Buyers often compare G20 Bengal Black Rough Granite Blocks with Absolute Black Granite to evaluate finish uniformity after processing.
180upx60up, 200upx100up, 200upx120up, 260upx160up etc.
For heavy-duty applications, G20 Bengal Black Rough Granite Blocks are frequently assessed alongside Royal Black Granite Blocks for strength and durability.
G20 Bengal Black Rough Granite Blocks arrive in natural quarry-extracted state, accommodating subsequent finishing during fabrication:
Raw/Rough Surface – Preserves original quarry texture enabling preliminary quality assessment and material grading before processing begins.
Saw-Cut Surface – Standard dimensional processing creating flat reference planes for subsequent finishing operations and accurate measurement.
Polished Finish – Achievable post-slab cutting revealing dramatic grey-white veining through mirror-like surface treatment.
Honed Finish – Produces smooth matte surfaces maintaining pattern definition, commonly specified for monument and architectural applications.
Flamed Finish – Creates textured slip-resistant surfaces through thermal treatment, standard specification for exterior paving applications.
Brushed Finish – Achievable after cutting delivering moderate texture suitable for flooring and exterior installations requiring traction.
Infrastructure and export projects sometimes shortlist G20 Bengal Black Rough Granite Blocks with Cats Eye Granite Blocks based on block size and cutting recovery.
G20 Bengal Black Rough Granite Blocks address large-scale applications where raw material characteristics determine finished product quality:
Monument Construction – Provides primary material for memorial installations, commemorative structures, and corporate monuments where block integrity ensures finished product excellence.
Dimensional Stone Fabrication – Supplies architectural construction requiring cut stone components including columns, balustrades, and decorative architectural elements.
Slab Production – Serves as source material for interior and exterior slab installations where consistent block quality enables uniform finished products.
Paving Manufacturing – Addresses cobblestone, paver, and hardscape production where reliable raw material ensures consistent finished product performance.
Sculpture Applications – Functions as medium for artistic and decorative carving where large unprocessed formations provide adequate material for creative expression.
Export Markets – Serves international construction industries seeking quality dark granite blocks for diverse residential, commercial, and institutional projects.
Stone processors evaluating rough material quality often review Imperial Red Rough Granite Blocks together with G20 Bengal Black Rough Granite Blocks.
G20 Bengal Black Rough Granite Blocks deliver practical benefits rooted in material composition and market positioning:
Veining Distinctiveness – Prominent grey-white linear patterns within blocks translate beautifully to finished products regardless of application, providing visual character exceeding solid black alternatives.
Structural Superiority – Dense crystalline composition delivers exceptional compression strength and durability suitable for demanding applications including monuments and load-bearing construction.
Regional Authenticity – Bengal origin provides genuine provenance documentation supporting clients requiring verified sourcing for institutional and governmental projects.
Fabrication Flexibility – Single blocks accommodate diverse cutting requirements producing slabs, tiles, monuments, and dimensional components from consistent source material.
Quality Transparency – Purchasing rough blocks enables buyers controlling fabrication quality ensuring specifications achieved throughout production.
Availability Consistency – Established West Bengal quarrying infrastructure ensures reliable supply supporting international project timelines.
G20 Bengal Black Rough Granite Blocks are commonly planned with Steel Grey Granite Blocks for projects requiring contrasting dark and mid-tone stones.
G20 Bengal Black Rough Granite Blocks require specific protocols during storage and handling ensuring material integrity:
Storage Positioning – Place blocks on stable flat surfaces preventing stress concentration; avoid excessive stacking creating unnecessary pressure compromising lower block integrity.
Moisture Protection – Cover stored blocks preventing prolonged environmental exposure; surface moisture combined with mineral content can cause staining affecting finished product aesthetics.
Handling Equipment – Employ appropriate machinery including cranes and lifting equipment; improper manual handling risks corner damage or surface fracturing affecting downstream fabrication quality.
Pre-Fabrication Assessment – Thoroughly examine blocks before cutting identifying internal fissures, color variations, or structural weaknesses affecting finished product outcomes.
Environmental Considerations – Shield stored blocks from temperature fluctuations preventing thermal stress within large stone formations during storage periods.
Post-Fabrication Protocols – Once cut and finished, standard dark granite maintenance applies including appropriate sealing and cleaning protocols specific to intended application.
Export buyers sometimes pair Vizag Blue Granite Blocks with G20 Bengal Black Rough Granite Blocks to diversify color ranges within the same shipment.
Property | Details |
| Origin | India (primarily West Bengal state, hence “Bengal Black”); also Odisha |
| Color | Deep black to charcoal black background with minimal white/gray flecking; very consistent, uniform appearance; low variation |
| Mineral Composition | Quartz (20-30%), Feldspar (50-60%), Biotite and Amphibole (15-20%), Pyroxene, minor accessory minerals |
| Classification | Igneous rock – Plutonic granite (fine to medium-grained basic/melanocratic granite) |
| Density | 2,850 – 3,050 kg/m³ (2.85 – 3.05 g/cm³) – Dense due to high dark mineral content |
| Porosity | Very low: 0.2 – 0.6% (by volume) |
| Water Absorption | Very low: 0.05 – 0.20% (by weight) per ASTM C97 |
| Compressive Strength | 1,800 – 2,600 kg/cm² (177 – 255 MPa / 25,600 – 37,000 psi) |
| Flexural Strength | 140 – 260 kg/cm² (14 – 26 MPa / 2,030 – 3,770 psi) per ASTM C880 |
| Mohs Hardness | 6 – 7 (hard, highly scratch-resistant) |
| Frost Resistance | Excellent – ideal for exterior use in all climates including severe freeze-thaw environments |
| Acid Resistance | Good to Very Good – resistant to most household acids; significantly better than marble |
| Heat Resistance | Excellent – withstands very high temperatures (up to 300°C / 572°F continuous); superior heat resistance |
| Abrasion Resistance | Very High: 28 – 35 on Hardness Abrasion (HA) scale per ASTM C241 |
| Stain Resistance | Excellent – extremely low porosity provides superior natural stain resistance; sealing optional but recommended |
BBV Impex maintains direct quarry relationships throughout West Bengal’s primary G20 Bengal Black extraction zones conducting geological assessment before block selection ensuring structural soundness and veining quality. Our selection protocols evaluate pattern distribution, density consistency, and dimensional integrity before inventory acceptance. As a granite blocks exporter from India with regional expertise, we coordinate extraction scheduling aligned with project requirements. Export operations incorporate protective packaging preventing corner damage and surface marking during international shipping. Documentation services manage complete certifications, customs compliance, and logistics coordination meeting international standards. Technical consultation provides block grading, fabrication guidance, and application-specific recommendations.
Frequently Asked Questions
How does G20 Bengal Black block quality differ from other dark granite varieties?
Distinguishes through prominent grey-white veining within dark background rather than solid uniform darkness. Block quality assessment should prioritize vein distribution consistency ensuring finished products maintain dramatic visual character throughout fabrication.
What block dimensions does BBV Impex typically supply for G20 Bengal Black?
Standard dimensions range approximately 250x125x60 centimeters though specific measurements vary by quarry production capacity. Custom dimensions accommodate project requirements with adequate lead time for extraction and processing scheduling.
Can G20 Bengal Black blocks produce both monuments and slabs simultaneously?
Yes—larger blocks accommodate multiple cutting plans optimizing material utilization. Fabricators design cutting layouts producing diverse components from single formations while maintaining consistent quality throughout production.
How should buyers assess veining quality before purchasing rough blocks?
Request geological documentation confirming structural integrity. View representative block samples demonstrating vein distribution consistency. Professional assessment prevents expensive fabrication failures resulting from substandard raw material selection.
What fabrication equipment handles G20 Bengal Black effectively?
Diamond-equipped cutting machinery performs optimally with dense dark granite. Experienced fabricators familiar with medium grain materials ensure clean cuts without excessive chipping or material waste during processing.
Does the veining pattern remain consistent throughout block depth?
Generally yes—mineral distribution typically maintains consistency throughout geological formations. However, internal variations occur naturally; thorough pre-fabrication inspection identifies any significant pattern changes before cutting begins.
What export documentation requirements apply for rough granite blocks?
Phytosanitary certificates for wooden packaging, commercial invoices matching block specifications, bills of lading, certificates of origin, and compliance with destination country import regulations. Experienced exporters navigate documentation requirements efficiently.
How does purchasing rough blocks compare economically to buying finished slabs?
Block pricing typically proves lower per cubic meter than finished material; however, fabrication costs must be added. Total cost advantage depends on production volume, fabrication capabilities, and specific application requirements.
