{"product_id":"blue-gray-granite-dust","title":"Blue-Gray Granite Dust","description":"\u003cp\u003e\u003cstrong\u003eBlue-Gray Granite Dust — The Compactable Fines That Lock Pavers Together \u0026amp; Finish Walkways\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSame spec class as \u003ca href=\"https:\/\/ottrsupply.com\/products\/10-stone-dust\" title=\"#10 Stone Dust\"\u003e#10 Screenings\u003c\/a\u003e (AASHTO M43 \/ ASTM D448 No. 10) — blue-gray granite variant of the same gradation.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eBlue-Gray Granite Dust is the quarter-minus by-product of crushing our native Boston-area granite — the fine material that packs to a hard, near-concrete-like surface when it gets the right moisture and a tamper. Hardscape installers sweep it into paver joints. Trail builders compact it as a finished walking surface. Horse owners spread it as low-cost arena footing. It's the unsung hero of any project where stone needs to lock together and stay put.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlue-gray granite screenings, native to the Boston area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQuarter-minus (passes ⅜\", high-fines, angular)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCoverage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~150 sq ft at 2\" depth (compacted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~2,700 lbs\/yd³ (~1.35 tons)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlso known as\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e#10 screenings, stone dust, blue stone dust, quarter-minus, blue-gray pack, granite fines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSold by\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThe cubic yard, bulk dump truck delivery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat it's good for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePaver joint sweep-in for natural stone and concrete pavers\u003c\/li\u003e\n\u003cli\u003eCompactable walkway surfaces on garden paths and trails\u003c\/li\u003e\n\u003cli\u003eHorse paddock and riding arena footing\u003c\/li\u003e\n\u003cli\u003eTop-finish over base layers on patio and walkway installs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow much do I need?\u003c\/h3\u003e\n\u003cp\u003eFor a 4' × 25' garden path at 2\" compacted depth, plan on about 0.6 cubic yards. A 200 sq ft paver patio with stone-dust joint sweep-in needs roughly 0.2 yards — just enough to fill the joints and clean up the surface. Always compact in 1\" lifts when building a structural walking surface.\u003c\/p\u003e\n\u003ch3\u003eHow Blue-Gray Granite Dust compares\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. #10 Stone Dust (standard granite):\u003c\/strong\u003e Same gradation, different color profile. Blue-gray has a steel undertone that reads cool; the standard #10 is the neutral gray.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Mason Sand:\u003c\/strong\u003e Mason sand is rounder and softer (used for mortar). Blue-gray granite dust is angular and locks under compaction — better for walkway setting beds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Dense Pack:\u003c\/strong\u003e Dense Pack has a ¾\" top stone plus fines. Blue-Gray Granite Dust is just the fines. Use dust to top a dense-pack base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Concrete Sand:\u003c\/strong\u003e Concrete sand drains better and is the ICPI-spec'd paver bedding sand. Stone dust is the traditional joint-sweep material — different layer, different job.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is Blue-Gray Granite Dust used for?\u003c\/strong\u003e\u003cbr\u003eWalkway setting beds, paver joint fill, top dressing on driveways, arena footing, and footing for stepping stones and flagstone. It compacts to a near-solid layer that locks the surface above it in place.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Blue-Gray Granite Dust the same as #10 screenings?\u003c\/strong\u003e\u003cbr\u003eSame spec class (AASHTO M43 \/ ASTM D448 No. 10) — just the blue-gray color profile of the granite. Gradationally identical to standard #10 stone dust.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Blue-Gray Granite Dust drain?\u003c\/strong\u003e\u003cbr\u003eNot well. The fines pack tight, so water sheds across the surface rather than percolating through. That's a feature for walkways (no settling) but a bug if drainage is needed — for drainage, use a clean stone instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use Blue-Gray Granite Dust under pavers?\u003c\/strong\u003e\u003cbr\u003eFor dry-laid stepping stones and flagstone, yes — it is the traditional setting bed. For interlocking concrete pavers, contemporary ICPI guidance prefers concrete sand for bedding; stone dust is still used for joint sweep-in.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much does a cubic yard of stone dust weigh?\u003c\/strong\u003e\u003cbr\u003eAbout 2,700 lbs per cubic yard, or roughly 1.35 tons.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo you deliver stone dust in the Boston area?\u003c\/strong\u003e\u003cbr\u003eYes — same-day and next-day bulk delivery across Suffolk, Middlesex, Norfolk, and Plymouth Counties.\u003c\/p\u003e\n\u003cp\u003eSame-day and next-day bulk delivery, no minimum order. We deliver across \u003ca href=\"https:\/\/ottrsupply.com\/collections\/middlesex-county-landscape-supply\"\u003eMiddlesex\u003c\/a\u003e, \u003ca href=\"https:\/\/ottrsupply.com\/collections\/norfolk-county-landscape-supply\"\u003eNorfolk\u003c\/a\u003e, \u003ca href=\"https:\/\/ottrsupply.com\/collections\/suffolk-county-landscape-supply\"\u003eSuffolk\u003c\/a\u003e, and \u003ca href=\"https:\/\/ottrsupply.com\/collections\/plymouth-county-landscape-supply\"\u003ePlymouth County\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003ePair with our \u003ca href=\"https:\/\/ottrsupply.com\/products\/dense-pack-075-to-minus\"\u003edense pack ¾\" to minus\u003c\/a\u003e for the compacted base layer underneath, or our \u003ca href=\"https:\/\/ottrsupply.com\/products\/blue-gray-granite-0-5\"\u003eblue-gray granite ½\"\u003c\/a\u003e for the decorative layer alongside.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrder today — the compactable blue-gray fines that finish hardscape projects clean.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is Blue-Gray Granite Dust used for?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Walkway setting beds, paver joint fill, top dressing on driveways, arena footing, and footing for stepping stones and flagstone. It compacts to a near-solid layer.\"}},{\"@type\":\"Question\",\"name\":\"Is Blue-Gray Granite Dust the same as #10 screenings?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Same spec class (AASHTO M43 \/ ASTM D448 No. 10) — just the blue-gray color profile of the granite. Gradationally identical to standard #10 stone dust.\"}},{\"@type\":\"Question\",\"name\":\"Does Blue-Gray Granite Dust drain?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not well. The fines pack tight, so water sheds across the surface rather than percolating through.\"}},{\"@type\":\"Question\",\"name\":\"Can I use it under pavers?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For dry-laid stepping stones and flagstone, yes — it is the traditional setting bed. For interlocking concrete pavers, ICPI guidance prefers concrete sand for bedding; stone dust is still used for joint sweep.\"}},{\"@type\":\"Question\",\"name\":\"How much does a cubic yard of stone dust weigh?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"About 2,700 lbs per cubic yard, or roughly 1.35 tons.\"}},{\"@type\":\"Question\",\"name\":\"Do you deliver in the Boston area?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Same-day and next-day bulk delivery across Suffolk, Middlesex, Norfolk, and Plymouth Counties.\"}}]}\u003c\/script\u003e","brand":"Ottr Landscape Supply","offers":[{"title":"Default Title","offer_id":46162967822564,"sku":"4020","price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/8528\/9700\/files\/BlueStoneRockFines.png?v=1742512179","url":"https:\/\/ottrsupply.com\/products\/blue-gray-granite-dust","provider":"Ottr Landscape Supply","version":"1.0","type":"link"}