Country and Quarry Origin
Primary quarries locate in Karnataka & Andhra Pradesh, India; premium igneous granite with stable block yield & consistent deep black base across quarry lots.
Bengal Black Granite Blocks For Further Processing Into Big Slabs
Bengal Black Granite(G20) is premium Indian gabbro‑type granite blocks with deep jet‑black base scattered evenly with fine silvery‑white mineral speckles. High density, low water absorption, excellent frost‑resistance & compressive strength. Blocks in standard quarry sizes for further processing into big slabs, tiles, countertops, wall cladding, flooring and exterior facade projects. Available in Classic Grade & Premium Dark Grade for selection
Category: Granite Blocks
Color: Black
Product description
Bengal Black Granite Blocks are prestigious premium quarry‑raw natural granite blocks with classic deep‑black tonality, highly recognized in global stone trade and architectural engineering for its consistent dark background and subtle sparkling silvery‑white crystalline speckles, widely selected for raw‑block supply for ultra‑luxury residential interiors, high‑star hotel projects, upscale villa renovation, monument fabrication and high‑grade interior & exterior commercial architectural customization. Formed over millions of years through magmatic crystallization and deep crustal geological evolution, this stone features an ultra‑dense, rigid fine‑grained interlocking crystalline structure with superior hardness, outstanding toughness and long‑term weather stability, comprehensively outperforming conventional marble. It boasts a profound jet‑black base tone, naturally embedded with evenly distributed fine shimmering silvery‑white mineral speckles, creating a solemn, sophisticated and timeless visual effect that interprets classic dark‑tone luxury aesthetics. With exceptional physical stability, outstanding abrasion resistance, remarkable compression performance and excellent outdoor weather adaptability, Bengal Black Granite maintains stable premium decorative effects for long‑term indoor high‑end finishing and exterior facade & monument engineering works. Its superb polishing capability, saturated uniform deep‑black tone and exclusive subtle sparkling granular texture render it a top‑tier raw‑block material for manufacturing luxury wall cladding, high‑grade flooring, custom countertops, architectural columns, stair treads and full‑space high‑end personalized stone customization.
Category: Natural Granite Stone (Quarry Raw Blocks)
Color: Profound jet‑black base tone evenly scattered with fine shimmering silvery‑white mineral speckles; low block‑to‑block color variation, solemn sophisticated dark‑toned artistic temperament
Surface Finish Available: Rough Quarry Face / Polished / Honed / Flamed / Bush‑hammered
Block Form: Raw Quarry Block
Texture: Fine‑grained compact granite crystalline texture with tightly interlocked mineral grains; achieves flawless high‑gloss mirror polishing to fully display subtle silvery speckle luster; flamed & bush‑hammered finishes provide reliable anti‑slip performance for outdoor scenarios
Density: 2.68 – 2.75 g/cm³ (High compactness; guarantees reliable structural stability and long‑lasting decorative durability for prolonged indoor & outdoor heavy‑duty application)
Water Absorption: < 0.15% (Low water permeability; perfectly applicable for interior flooring, wall cladding, countertops, wet areas and exterior facade & monument decoration projects)
Compressive Strength: 165 – 195 MPa (Excellent structural strength and pressure resistance; suitable for large‑scale engineering decoration and long‑term high‑frequency usage scenarios)
Abrasion Resistance: Great wear, scratch and stain resistance, vastly superior to ordinary marble; ideal for high‑traffic luxury floors, dark‑tone feature walls, exterior monument & facade engineering projects and bespoke stone decorative furnishings
GANGSAW SUITABILITY
Bengal Black Granite raw quarry blocks are fully compatible with standard gangsaw processing equipment. Regular quarry block dimensions fit optimal gangsaw cutting ranges. The stone features homogeneous fine‑grain internal crystallization with sporadic minor natural mineral cleavage and stable overall hardness. Silvery‑white speckle distribution keeps consistent among most blocks, bringing low and controllable processing loss. It serves as a reliable premium dark‑colour granite raw block for mass slab production, monument fabrication and high‑end architectural engineering projects.
Recommended Processing: Gangsaw slabs (1.8 cm & 2 cm), followed by calibration, edge trimming and high‑gloss mirror polishing / flamed / bush‑hammered treatment
Expected Slab Yield: Approximately 76‑86 slabs per block (based on 1.8 cm thickness)
Polish Result: Deep jet‑black high‑gloss mirror surface with evenly spread subtle shimmering silvery‑white speckles, presenting solemn sophisticated texture and exclusive timeless dark‑luxury decorative appearance
About
Texture
Fine-grained holocrystalline compact texture, tightly interlocked mineral grains, ultra-low porosity, dense solid block structure for processing.
Pattern and Veining
Deep jet black base with faint sparse silver/grey mineral flecks, nearly uniform solid black tone, minimal natural veining, neat & stable slab appearance after cutting.
Durability
Superior freeze-thaw resistance, ultra-low water absorption, strong anti-weathering & anti-abrasion performance, long service life for permanent exterior projects.
Available Surfaces
Polished, Bush Hammered, Sandblasted
Acid Sensitivity
Excellent resistance to daily weak acid; resist general environmental acid rain erosion; avoid long contact with hydrofluoric acid & strong acidic cleaning agents.
Physical Properties
- Density
- 2660 to 2760 kg/m³
- Flexural Strength
- 13 to 17 MPa
- Mohs Hardness Scale
- 6.6 to 7
Applications
lobby backdrop wallsStaircaseSteam/Shower Wall
Mineralogical Composition
Quartz37%
Feldspar40%
Chemical Properties
Main component SiO₂ 70~74%, Al₂O₃ 13.2~15.5%, stable silicate structure, negligible soluble carbonate, stable under conventional atmospheric & outdoor environment.
Installation Guide
Exterior cladding adopt AISI316L stainless steel dry hanging system; use low-alkali adhesive to prevent efflorescence; reserve thermal expansion joints properly.
Cleaning & Maintenance
Only neutral stone cleaner allowed; apply penetrating sealer for outdoor high-traffic areas; wipe acidic liquid spills timely.
Custom Cutting
Process raw blocks into big slabs, tiles, special shaped parts; customizable thickness 12~100mm, tailor sizes & shapes per project construction drawings.
