{"product_id":"black-limestone-hearth-slab","title":"Black Limestone Hearth Slab","description":"\u003cp\u003eDirect-from-quarry \u003cstrong\u003eblack limestone hearth slabs\u003c\/strong\u003e, stocked in three sizes with a choice of machine-sawn or hand-cut edges. Calibrated to a 20–24 mm nominal thickness with a tactile, fine-textured face. Part of \u003ca href=\"\/collections\/black-limestone-hearths-20mm\"\u003eour Black Limestone range\u003c\/a\u003e and \u003ca href=\"\/collections\/natural-limestone-hearth-slabs-black-grey\"\u003eour Limestone Hearths range\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eStock Sizes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003e1200 × 380 × 20mm\u003c\/b\u003e — front hearth section, approx. 26 kg per slab. Sawn or hand-cut edge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e900 × 600 × 20mm\u003c\/b\u003e — chamber section or standalone hearth, approx. 30 kg per slab. Sawn or hand-cut edge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e900 × 450 × 20mm\u003c\/b\u003e — chamber section, approx. 23 kg per slab. Sawn edge only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEdge Options\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eMachine-Sawn Edges (4 sides):\u003c\/b\u003e Precision-cut for crisp, clean lines, seamless jointing and a sharp, architectural frame around your stove or insert fire.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHand-Cut Edges (3 sides):\u003c\/b\u003e Traditional hand-cut edges on both short sides and one long side. The remaining long side is machine-sawn to ensure a tight joint against a chamber section, brickwork or wall.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eHighlights\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCalibrated 20–24 mm Nominal Thickness:\u003c\/b\u003e Precision-calibrated to ensure a flat, consistent bed height for quick, seamless installation and level bedding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTextured Sawn Finish (Tactile Orange Peel Feel):\u003c\/b\u003e Feature-grained with a subtle, tactile orange peel texture that balances contemporary minimalism with anti-slip grip and natural character.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e14-Day Crack Guarantee:\u003c\/b\u003e Fit your hearth within 14 days of delivery. If a slab cracks in that time, we replace it free.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFree Photo Service:\u003c\/b\u003e A free photo of your exact slab before dispatch whenever sealing or cutting is added.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOrder a sample:\u003c\/b\u003e Choose up to 2 free samples for a flat £5 delivery fee. \u003ca href=\"\/products\/slate-and-limestone-samples\"\u003e\u003cstrong\u003eOrder your sample\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEngineered with a calibrated 20–24 mm nominal thickness, a distinctive fine-textured surface, and your choice of edge profile, this high-grade black limestone delivers exceptional structural density and thermal performance. Exhibiting an attractive, warm charcoal-grey tone in its raw state, this low-porosity limestone darkens into a deep, velvety jet-black when treated with an impregnating sealer or colour intensifier. Purpose-designed for luxury fireplace hearths, stove pads, window sills, coping, and interior architectural steps where you need clean geometry and reliable durability. Available nationwide as single slabs, bespoke cut-to-size pieces, or \u003ca href=\"\/products\/black-limestone-hearth-slab-full-crate\"\u003efull wholesale crates\u003c\/a\u003e for trade buyers across the UK.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDimensions:\u003c\/b\u003e 1200 × 380 mm, 900 × 600 mm or 900 × 450 mm (+\/- 2mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eThickness:\u003c\/b\u003e 20–24 mm nominal (Calibrated)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWeight:\u003c\/b\u003e Approx. 26 kg (1200 × 380), 30 kg (900 × 600), 23 kg (900 × 450) per slab\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSurface Finish:\u003c\/b\u003e Tactile, matte fine-textured (\"orange peel\" feel)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEdge Finish:\u003c\/b\u003e 4-side machine sawn, or hand-cut on 3 sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eColour Profile:\u003c\/b\u003e Raw state Charcoal Grey; darkens to a deep, near jet-black when sealed\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFlexural Strength:\u003c\/b\u003e 24.69 MPa (56 Freeze-Thaw Cycles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWater Absorption:\u003c\/b\u003e 0.04% (Ultra-Low Porosity \u0026amp; Exceptional Frost Resistance)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSlip Resistance:\u003c\/b\u003e PTV 73 (Dry) \/ PTV 57 (Wet)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eCrack Guarantee\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eFit your hearth within 14 days of delivery. If a slab cracks in that time, we replace it free.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCut to Size\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eNeed a size we don't stock? \u003ca href=\"\/products\/limestone-hearth-cut-to-size?finish=black\"\u003eLimestone Cut to Size\u003c\/a\u003e cuts a front hearth, a chamber, or both for a T-shape, each from its own slab. Every piece is cut, edge-dressed, cleaned and sealed. From £155 including the slab. Standard 14 days or Priority 7 days. Hand-cut edge slabs aren't cut, but you can pair a stock hand-cut front (1200 × 380) with a chamber cut to your size: choose 'Hand-cut front + chamber' on \u003ca href=\"\/products\/limestone-hearth-cut-to-size?finish=black\u0026amp;part=hand\"\u003eLimestone Cut to Size\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eSee how our \u003ca href=\"\/pages\/workshop\" title=\"Cutting, finishing, and sealing services\"\u003ecutting, finishing, and sealing services\u003c\/a\u003e work for slate and limestone.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eOrdering, Wholesale Crates \u0026amp; Nationwide Delivery\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Quantities:\u003c\/strong\u003e Buy individual slabs for precise cut-to-size hearth work, or full crates for trade project savings across the UK.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNationwide Logistics:\u003c\/strong\u003e Direct-to-site delivery via 3rd-party nationwide pallet networks. Offloaded by tail lift and delivered kerbside.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomer Quotes:\u003c\/strong\u003e Call \u003cstrong\u003e01908 46 46 56\u003c\/strong\u003e or email drawings to \u003cstrong\u003esales@blueskystone.com\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bluesky Stone Direct","offers":[{"title":"1200 × 380 \/ Sawn \/ 20mm","offer_id":64538046857593,"sku":"SS-BL1238-S","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"1200 × 380 \/ Hand-Cut \/ 20mm","offer_id":64538046890361,"sku":"SS-BL1238-HC","price":70.0,"currency_code":"GBP","in_stock":true},{"title":"900 × 600 \/ Sawn \/ 20mm","offer_id":64538046923129,"sku":"SS-BL9060-S","price":30.0,"currency_code":"GBP","in_stock":true},{"title":"900 × 600 \/ Hand-Cut \/ 20mm","offer_id":64538046955897,"sku":"SS-BL9060-HC","price":30.0,"currency_code":"GBP","in_stock":true},{"title":"900 × 450 \/ Sawn \/ 20mm","offer_id":64538046988665,"sku":"SS-BL945-S","price":50.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0400\/9866\/0501\/files\/BL-1238-S-FRONT.jpg?v=1785777499","url":"https:\/\/blueskystone.com\/products\/black-limestone-hearth-slab","provider":"Bluesky Stone","version":"1.0","type":"link"}