{"product_id":"blue-black-granite-flamed-cobblestone-50-mm","title":"Blue Black Granite Flamed Cobblestone 50 MM","description":"\u003ctitle\u003eBlue Black Granite Flamed Cobblestones 50mm | Paving \u0026amp; Slabs\u003c\/title\u003e\n\u003cmeta name=\"description\" content=\"Buy Blue Black Granite Flamed Cobblestones (50mm). Heavy-duty dark setts with anti-slip texture for driveways, paths \u0026amp; patio borders. UK delivery available!\"\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What are Blue Black Granite Flamed Cobblestones used for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"They are ideal for heavy-duty driveways, high-traffic pathways, patio perimeter borders, and structural garden edges. Their 50mm thickness provides exceptional load-bearing strength while keeping lawn soil, turf, and loose gravel neatly contained.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is a flamed surface finish on granite cobbles?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A flamed finish is achieved by exposing the surface of the granite to high-temperature flames. This thermal treatment causes the surface crystals to burst, creating a micro-textured, anti-slip surface with a rich, natural tactile finish.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are 50mm Blue Black Granite Cobblestones frost-proof?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Natural granite is an extremely dense natural stone with minimal water absorption, ensuring these 50mm setts resist freeze-thaw cycles and severe winter frost without cracking or spalling.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do dark granite cobblestones require sealing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"While granite is naturally tough and non-porous, applying a high-quality breathable stone sealer is recommended to protect the deep blue-black colour from fading and shield against oil drips, moss, and lichen.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do you clean and maintain flamed granite cobblestones?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Maintenance is minimal. Routine sweeping and occasional washing with warm soapy water or a pressure washer will easily remove dirt and maintain the deep charcoal-black aesthetic.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003ch1\u003eBlue Black Granite Flamed Cobblestone 50mm | Deep Charcoal Setts\u003c\/h1\u003e\n\n\u003cp\u003eBring bold architectural character and modern sophistication to your outdoor space with \u003cstrong\u003eBlue Black Granite Flamed Cobblestones (50mm Thickness)\u003c\/strong\u003e. Available from \u003cstrong\u003ePaving and Slabs Ltd\u003c\/strong\u003e, these premium natural stone setts combine high load-bearing strength with a textured flamed surface, making them ideal for driveways, garden pathways, and high-impact patio borders.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing a rich dark charcoal-black palette with subtle blue undertones, these heavy-duty 50mm granite cobbles are engineered for outstanding durability. The thermal flamed surface treatment bursts the top crystalline layer to create a tactile, non-slip finish, offering exceptional underfoot traction while easily enduring vehicular traffic and adverse weather conditions.\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #fafafa; padding: 20px; border-radius: 8px; margin: 20px 0; border: 1px solid #e3e3e3;\"\u003e\n\u003ch3 style=\"margin-top: 0; color: #111;\"\u003eBlue Black Granite Highlights\u003c\/h3\u003e\n\u003cul style=\"column-count: 2; list-style-position: inside; margin-bottom: 0;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Charcoal Aesthetic:\u003c\/strong\u003e Rich blue-black tones with fine natural grain detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50mm Heavy-Duty Core:\u003c\/strong\u003e Superior load-bearing depth built for driveways and aprons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlamed Anti-Slip Surface:\u003c\/strong\u003e High-grip thermal finish engineered for wet traction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather \u0026amp; Frost Resistant:\u003c\/strong\u003e Dense natural granite core resists cracking and fading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003ePractical Landscape Applications\u003c\/h2\u003e\n\u003cp\u003eBlue Black Granite 50mm flamed cobblestones offer structural boundary containment and striking dark contrast across residential and commercial landscapes. Key uses include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePaving robust driveways, parking aprons, and vehicular entryways.\u003c\/li\u003e\n\u003cli\u003eCreating sharp, modern borders around patios, flower beds, and lawns.\u003c\/li\u003e\n\u003cli\u003eConstructing contemporary cobble pathways, courtyards, and garden walkways.\u003c\/li\u003e\n\u003cli\u003eBuilding durable step treads, drainage channels, and feature bands.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCreative Design Pairings \u0026amp; Material Coordination\u003c\/h2\u003e\n\u003cp\u003eThe deep, moody tones of Blue Black Granite allow for versatile design options across our product ranges:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSleek Monochromatic Style:\u003c\/strong\u003e Pair directly with dark paving options like \u003ca href=\"https:\/\/pavingandslabs.co.uk\/products\/manchester-midnight-porcelain-paving-slabs-900-600\"\u003eManchester Midnight Porcelain Slabs\u003c\/a\u003e for a seamless dark patio scheme.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Framing:\u003c\/strong\u003e Border bright paving layouts like \u003ca href=\"https:\/\/pavingandslabs.co.uk\/products\/mountain-white-paving-slabs\"\u003eMountain White Porcelain Slabs\u003c\/a\u003e to create a sharp, light-against-dark frame.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Mid-Tones:\u003c\/strong\u003e Outline soft grey paving choices such as \u003ca href=\"https:\/\/pavingandslabs.co.uk\/products\/kandla-grey-porcelain-paving-slabs\"\u003eKandla Grey Porcelain Paving\u003c\/a\u003e to add definition and depth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural Stone Fusion:\u003c\/strong\u003e Accentuate traditional schemes by pairing alongside our natural \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/indian-sandstone\"\u003eIndian Sandstone Collection\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eExplore our complete catalog of hardscaping products in our main \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/paving-slabs\"\u003ePaving Slabs\u003c\/a\u003e, \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/patio-slabs\"\u003ePatio Slabs\u003c\/a\u003e, and \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/porcelain-paving\"\u003ePorcelain Paving\u003c\/a\u003e sections. For expert landscaping insights, see our guide on the \u003ca href=\"https:\/\/pavingandslabs.co.uk\/blogs\/latest-news\/best-paving-slabs-for-patios-and-gardens-in-2025-stylish-yet-affordable-choices\"\u003ebest paving slabs for patios and gardens\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eProfessional Installation Guidelines\u003c\/h2\u003e\n\u003cp\u003eTo guarantee long-term stability under heavy vehicle or foot traffic, install these 50mm granite cobblestones on a \u003cstrong\u003efull continuous wet mortar bed\u003c\/strong\u003e (typically a 4:1 sharp sand to cement mix) over a well-compacted MOT Type 1 sub-base. Avoid spot-bedding, as hollow pockets under the setts compromise structural integrity under load. Apply a coat of slurry primer to the back of each cobble before placing it onto the wet mortar bed, and complete the installation using a high-performance outdoor jointing mortar.\u003c\/p\u003e\n\n\u003cdiv style=\"border-top: 1px solid #ddd; margin-top: 30px; padding-top: 20px;\"\u003e\n\u003ch3\u003eTechnical Data Matrix \u0026amp; Structural Specs\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa; width: 30%;\"\u003eProduct Format\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003eNatural Granite Cobble \/ Sett (50mm Depth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eCore Composition\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003e100% Solid Natural Blue Black Igneous Granite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eSurface Processing\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003eThermal Flamed Slip-Resistant Top Surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eThickness Calibration\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003e50mm Depth for High Load-Bearing Capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003ePorosity \u0026amp; Frost Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003eUltra-Low Moisture Intake (\u0026lt;0.2%, Completely Frost-Proof)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq-section\"\u003e\n  \u003ch3\u003eWhat are Blue Black Granite Flamed Cobblestones used for?\u003c\/h3\u003e\n  \u003cp\u003eThey are ideal for heavy-duty driveways, high-traffic pathways, patio perimeter borders, and structural garden edges. Their 50mm thickness provides exceptional load-bearing strength while keeping lawn soil, turf, and loose gravel neatly contained.\u003c\/p\u003e\n\n  \u003ch3\u003eWhat is a flamed surface finish on granite cobbles?\u003c\/h3\u003e\n  \u003cp\u003eA flamed finish is achieved by exposing the surface of the granite to high-temperature flames. This thermal treatment causes the surface crystals to burst, creating a micro-textured, anti-slip surface with a rich, natural tactile finish.\u003c\/p\u003e\n\n  \u003ch3\u003eAre 50mm Blue Black Granite Cobblestones frost-proof?\u003c\/h3\u003e\n  \u003cp\u003eYes. Natural granite is an extremely dense natural stone with minimal water absorption, ensuring these 50mm setts resist freeze-thaw cycles and severe winter frost without cracking or spalling.\u003c\/p\u003e\n\n  \u003ch3\u003eDo dark granite cobblestones require sealing?\u003c\/h3\u003e\n  \u003cp\u003eWhile granite is naturally tough and non-porous, applying a high-quality breathable stone sealer is recommended to protect the deep blue-black colour from fading and shield against oil drips, moss, and lichen.\u003c\/p\u003e\n\n  \u003ch3\u003eHow do you clean and maintain flamed granite cobblestones?\u003c\/h3\u003e\n  \u003cp\u003eMaintenance is minimal. Routine sweeping and occasional washing with warm soapy water or a pressure washer will easily remove dirt and maintain the deep charcoal-black aesthetic.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Paving and Slabs","offers":[{"title":"Blue Black Granite Flamed Cobbles (200x100x50 MM\/500 Pcs\/10 SQM Pack)","offer_id":48688898441470,"sku":null,"price":749.0,"currency_code":"GBP","in_stock":true},{"title":"Blue Black Granite Flamed Cobbles (100x100x50 MM\/1000 Pcs\/10 SQM Pack)","offer_id":48688898474238,"sku":null,"price":749.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/3647\/5134\/files\/blue-black-granite-cobbles-50mm.jpg?v=1785926876","url":"https:\/\/pavingandslabs.co.uk\/products\/blue-black-granite-flamed-cobblestone-50-mm","provider":"Paving and Slabs","version":"1.0","type":"link"}