Black Basalt Bush-Hammered Stone 24″ × 12″

Volcanic Natural Stone in a Versatile Plank Format — Built for Durability & Contemporary Design

Citadel Stone’s Black Basalt Bush-Hammered Stone in 24″ × 12″ is one of the most versatile and architecturally considered formats in our black basalt range. The elongated plank proportion creates a strong directional quality in both horizontal and vertical surfaces — ideal for establishing visual flow across large driveways and terraces, defining clean linear patterns on interior floors, and creating dramatic feature walls with a genuine sense of material depth and scale.

Finished with a mechanical bush-hammering process that produces thousands of uniform, shallow indentations across the stone face, this format combines the extraordinary hardness and density of volcanic basalt with a textured, non-polished surface. The deep charcoal-to-jet-black colouration and the textured finish work together to create a surface of contemporary authority — equally at home in high-specification residential projects and demanding commercial environments.

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What is Black Basalt Bush-Hammered Stone?

Black basalt is an igneous volcanic rock formed from the rapid cooling of basaltic lava — one of the hardest and densest natural stones available for architectural and landscape use. Its low water absorption (0.59–0.69%, certified mill test) and resistance to pool chemicals and UV exposure suit it to a wide range of exterior and interior applications. For freeze-thaw and de-iced paving, talk to us about the right thickness and finish, and have your installer design the base and bedding for frost and de-icing salt.

The bush-hammered finish is produced by passing pneumatic hammering tools across the stone face, creating a controlled field of uniform indentations. The bush-hammered face is textured rather than polished — one of our most textured finishes, popular for pool decks and our pick for wet steps and slopes — while remaining visually refined in appearance. Brushed is also a popular choice for pool decks and surrounds, driveways and patios; for these areas we recommend a coarse grit. Any paving can be slippery when wet. Finish, slope, drainage, sealer and footwear all play a part, so ask your designer to confirm local pool-deck and code requirements.

The 24″ × 12″ format sits at the most versatile point in the black basalt size range. Large enough to make a strong visual statement and reduce the frequency of joints across a surface, compact enough to handle comfortably on site, negotiate curves, and be cut efficiently for complex layouts — it is the format of choice for projects where design ambition and practical installation efficiency need to coexist.

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Key Features

Bush-Hammered Texture The distinctive bush-hammered finish creates controlled surface texture through mechanical impact, producing uniform indentations across the stone face. The face is textured rather than polished — bush-hammered is one of our most textured finishes and our pick for wet steps and slopes — while remaining practical for everyday foot traffic — critical in pool surround, spa, and garden path settings.

Volcanic Hardness & Exceptional Durability Basalt’s formation from rapidly cooled volcanic lava produces one of nature’s hardest natural stone materials, with a density of 3.01 g/cm³. This translates to outstanding abrasion resistance, minimal surface wear under sustained heavy traffic, and the ability to withstand furniture weight, planter loading, and intensive use without marking or deterioration. With proper installation, expect long service life.

Low Water Absorption (0.59–0.69%) Basalt’s water absorption measured just 0.59–0.69% in certified mill tests on two production batches, the lowest of the stones on our certificate — ask us about thickness and finish for cold climates, where freeze-thaw cycles degrade limestone, sandstone, and some granites. Low absorption does suit wet environments where continuous moisture exposure would compromise more porous alternatives. The stone resists staining from pool chemicals, food and beverage spills, and organic debris.

Total Chemical & Weather Resistance Pool chlorine, bromine, salt systems, de-icing chemicals, and environmental exposure have no measurable effect on basalt’s silicate mineral composition. UV radiation poses no threat to its surface quality — making it one of the most genuinely maintenance-free natural stone options available.

Contemporary Charcoal-Black Aesthetic The 24″ × 12″ plank format in deep charcoal-to-jet-black creates a strong directional flow across surfaces — elongating spaces visually, reinforcing architectural lines, and complementing contemporary design schemes with a boldness that square formats cannot replicate. The dark colouration provides dramatic contrast with light-coloured walls, pool water, and surrounding landscape elements, while the bush-hammered texture adds tactile depth that smooth surfaces lack.

Maintenance-Free Performance Basalt’s natural density eliminates sealing requirements in most applications. Routine maintenance consists of sweeping and occasional hosing — no specialist products, coatings, or ongoing treatments required. The bush-hammered texture also conceals minor surface wear and light soiling that would be more visible on a smooth finish, keeping the material looking its best with minimal effort.

Side view of black basalt pavers showing uniform calibrated thickness for easy professional installation.

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Specifications

Technical Properties

Available Sizes & Thicknesses

This product is offered in the 24″ × 12″ format as a focused, project-specific size. For alternative dimensions within the Black Basalt Bush-Hammered Stone range — including large-format, modular, and accent sizes — please refer to our full Black Basalt Bush-Hammered Stone collection or contact Citadel Stone to discuss project requirements.

Custom fabrication available — special thicknesses, shaped pieces, and project-specific cutting accommodated upon request. Contact Citadel Stone for current stock availability and lead times.

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Applications

Driveways In 2″ and 2.5″ heavy-duty thicknesses mortar-bonded to a reinforced concrete slab, Black Basalt Bush-Hammered Stone 24″ × 12″ makes a handsome residential driveway, and for commercial driveways your designer sets the thickness. The elongated plank format is particularly effective in driveway applications — laid perpendicular to the direction of travel, it creates a strong visual rhythm that draws the eye toward the entrance; laid parallel, it emphasises the length and linearity of the approach. The bush-hammered face is textured rather than polished, the finish we pick for wet steps and slopes, while basalt’s total chemical resistance ensures tire residue and chemical exposure cause no surface degradation. For freeze-thaw and de-iced paving, we can advise on thickness and finish; the base, bedding and joints are for your installer or engineer to design. No sealing is required, and routine maintenance is limited to occasional sweeping and hosing.

Patios & Terraces The 24″ × 12″ plank format creates outdoor terrace surfaces of contemporary authority — the directional quality of the elongated format works particularly well in large-area applications where establishing a clear visual axis or reinforcing the geometry of the architecture is the design objective. In a running bond layout, the stone creates surfaces that feel expansive and dynamically composed; in a stack bond, the grid reads as clean and formally resolved. The bush-hammered surface is textured rather than polished, a finish we recommend for outdoor paving and our pick for wet steps and slopes, basalt’s hardness resists furniture and equipment loading without marking, and the maintenance-free nature of the material keeps outdoor terraces performing and looking their best with no specialist upkeep.

Pool Surrounds & Coping Bush-hammered black basalt is a benchmark material for pool surround applications — its textured face and chemical inertness suit the setting (bush-hammered is a popular choice for pool decks and our pick for wet steps and slopes), while the dark colouration creates a dramatic, resort-quality contrast with blue and green pool water that lighter stones simply cannot replicate. The 24″ × 12″ format works particularly effectively around pool edges, where the plank proportion aligns cleanly with the coping line and creates a visually resolved perimeter. Basalt’s complete resistance to chlorine, bromine, and salt systems means there is no risk of surface degradation, discoloration, or structural deterioration over time — a significant and durable advantage over limestone, concrete, and even some porcelain alternatives. No sealing is required.

Garden Paths The 24″ × 12″ plank format is a particularly effective choice for garden path design, where its elongated proportion creates a natural sense of movement and direction through the landscape. Laid end-to-end in a running bond, the stone produces pathways with a strong linear quality that integrates with both formal and naturalistic garden settings; laid across the path direction, it creates a more deliberate, stepped rhythm suited to garden stairs and terraced slopes. The bush-hammered surface is textured rather than polished, a finish we recommend for outdoor paving and our pick for wet steps and slopes, the deep black colouration provides strong contrast against lighter gravel, planting, and lawn, and basalt’s maintenance-free performance means garden paths remain structurally intact and visually consistent year after year without treatment or intervention.

Wall Cladding Black Basalt Bush-Hammered Stone in the 24″ × 12″ format makes a compelling wall cladding material for exterior facades, garden boundary walls, and interior feature surfaces. The plank proportion creates strong horizontal coursing lines on vertical surfaces — particularly effective on long garden walls, entrance feature walls, and lower-level facade panels where the horizontal emphasis reinforces the architecture’s grounded quality. The bush-hammered texture adds tactile depth to wall surfaces that flat or polished stone cladding cannot achieve, and the deep black colouration creates a bold, graphic quality that reads with the same force from a distance as it does up close. On interior feature walls — in entrance halls, living rooms, and bathroom elevations — the combination of the plank format and textured surface creates a surface of genuine material presence.

Interior Floors Inside, Black Basalt Bush-Hammered Stone 24″ × 12″ brings the full force of volcanic stone’s aesthetic authority to floor applications. Laid in a running bond across hallways, open-plan living areas, and commercial lobbies, the plank format creates a strong directional flow that reads as decisively contemporary — and the bush-hammered surface, with its controlled texture and consistent depth of indentation, provides a visual complexity that polished or honed stone cannot achieve at this colour point. The stone’s abrasion resistance of 0.91 mm and density of 3.01 g/cm³ confirm it as one of the most structurally durable natural stone options available for high-traffic interior floors. The dark surface conceals minor footfall marks and light soiling effectively between cleans, and routine maintenance requires nothing beyond sweeping and occasional mopping — no sealing, no specialist treatment, no ongoing maintenance programme.

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Performance Comparison

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Care & Maintenance

Sealing Sealing is not required for Black Basalt Bush-Hammered Stone in most applications. Basalt’s natural density and extremely low water absorption rate of 0.59% provide inherent resistance to moisture, staining, and chemical exposure without the need for surface treatments. In specific interior applications where a wet or oiled surface finish is desired for aesthetic purposes, a penetrating impregnating sealer can be optionally applied — contact Citadel Stone for guidance.

Routine Cleaning Sweep or blow clear of debris regularly to prevent organic build-up in the bush-hammered surface’s texture. Hose down monthly or as needed to remove surface dust and residue. An annual pressure wash at 1,500–2,000 PSI refreshes the surface appearance in exterior settings. Use a pH-neutral stone cleaner for any targeted cleaning — avoid acidic products as a precaution on any natural stone surface.

Stain Removal For oil or grease spills, apply a commercial stone degreaser and rinse thoroughly. Most surface marks wash away readily given basalt’s minimal porosity. The bush-hammered texture’s depth of surface interest also helps conceal minor soiling between cleaning intervals.

Winter Care Standard snow-clearing equipment is fully compatible with the bush-hammered surface. Basalt is a dense silicate volcanic rock with no cement paste, so it is not open to the chemical attack that magnesium-chloride and CMA de-icers can cause in concrete. Any de-icing salt can still stress stone physically, so use the least de-icer you need, with salt-resistant joint and bedding materials.

Joint Maintenance (where applicable) Monitor polymeric sand joints annually in exterior applications. Refill any eroded areas to maintain weed resistance and surface stability. Correctly installed joints require minimal ongoing attention.

Frequently Asked Questions

Is Black Basalt Bush-Hammered Stone suitable for freezing climates? Of the stones we sell, Citadel Basalt is the one we recommend for freeze-thaw winters. It absorbed just 0.59–0.69% water in a certified mill test, the lowest of the stones on our certificate and under one-seventh of the 5% average that ASTM C936 allows for concrete pavers. We do not have a freeze-thaw cycle rating for our stone; we publish its measured absorption instead. In freeze-thaw areas the build matters as much as the stone: ask us about thickness and finish for driveways, steps and de-iced areas, and have your installer or engineer design a free-draining base and frost- and salt-resistant bedding and joints.

Can it be used for driveways? Absolutely. In 2″ and 2.5″ heavy-duty thicknesses mortar-bonded to a reinforced concrete slab, the stone’s density and structural properties make it fully appropriate for residential driveways, and for commercial vehicular surfaces your designer sets the thickness. The bush-hammered surface is textured rather than polished, one of our most textured finishes and our pick for wet steps and slopes.

Does it require sealing? No sealing is required in standard applications. Basalt’s natural density provides inherent protection against moisture, staining, and chemical exposure. An optional penetrating sealer can be applied in specific interior settings for aesthetic purposes if desired.

How does the 24″ × 12″ format compare to other sizes in the Black Basalt Bush-Hammered range? The 24″ × 12″ plank format is the most versatile and directionally expressive size in the range — suited to large-area surfaces where a strong linear quality is desired, and compact enough for efficient on-site handling and cutting. For projects requiring larger statement formats, smaller modular layouts, or mixed-size patterns, Citadel Stone’s full Black Basalt Bush-Hammered Stone range covers formats from 6″ × 6″ through to 36″ × 36″. Contact our team for guidance on the most appropriate format combination for your project.

Can it be used indoors? Yes. The bush-hammered surface and deep black colouration work particularly well on interior floors, feature walls, and fireplace surrounds, where the stone’s textural depth and volcanic character create a finish of genuine material authority. The surface’s ability to conceal minor footfall marks and its maintenance-free nature make it a practical as well as visually distinctive interior material.

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Why Choose Citadel Stone?

Premium Source Material — We source quarry-direct, at our selected basalt quarries, producing consistent, high-quality stone meeting rigorous density, hardness, and colour standards across every supply batch.

Precision Bush-Hammering — Advanced pneumatic hammering equipment ensures consistent texture depth and indentation pattern across every piece, delivering a professional finish on site.

Meticulous Quality Control — Multi-point inspection verifies dimensional accuracy, surface finish consistency, structural integrity, and absence of defects before despatch.

Custom Fabrication — Special thicknesses, non-standard cuts, and project-specific requirements are accommodated through our fabrication service. Contact Citadel Stone to discuss your project.

Expert Consultation — Our team brings extensive natural stone experience to every enquiry — material selection, quantity calculations, installation guidance, pattern design, and project logistics all supported as standard.

Nationwide Delivery — Reliable shipping across the continental United States with careful packaging to protect bush-hammered surfaces throughout transit. International supply also available.

Competitive Pricing — Direct quarry relationships and efficient supply chain operations allow Citadel Stone to offer premium black basalt at competitive market rates, with transparent project quoting as standard.

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Request a Quote or Consultation

Specify volcanic stone built for longevity and designed to define a space.

Request a Free Consultation — Our experienced team provides material guidance, format recommendations, quantity calculations, pattern advice, installation best practices, and detailed project quotes tailored to your exact brief.

Trade & Professional Support — Landscape contractors, architects, and design professionals receive dedicated account support, competitive trade pricing, full technical specifications, and coordinated project delivery at any scale.

Request a Sample — Assess the bush-hammered texture, surface depth, and deep black colouration of this material before committing to your project. Contact Citadel Stone to arrange a sample.

Citadel Stone — Premium Natural Stone for Spaces That Endure

Product specifications and pricing are subject to change. Contact Citadel Stone for current stock availability and project-specific recommendations.