#10 Stone Dust (Granite Screenings)

#10 Stone Dust (Granite Screenings) — The Spec'd Fines That Lock Walkways & Paver Joints #10 Stone Dust is the quarter-minus by-product of crushing granite — passes a ⅜" sieve, with a tight band of fines all the way through #200. It is the spec name (AASHTO M43 No. 10 / ASTM D448 No. 10) for what most yards call "screenings" or "stone dust": the material that compacts hard, finishes a walkway, locks pavers in their joints, and gives a stable footing under stepping stones. If a plan calls for "screenings" or "#10," this is the material. At a glance Spec name #10 Screenings (AASHTO M43 / ASTM D448 size No. 10) Material Crushed granite screenings, native to the Boston area Nominal size Passes ⅜" (¼"-minus, including fines through #200) Composition Granite chips, sand, and fines — angular, dry-screened Weight ~2,700 lbs per cubic yard (~1.35 tons) Coverage 1 yd³ covers ~80 sq ft at 4" depth (compacted) Also known as Stone dust, screenings, quarter-minus, pack, manufactured sand, decomposed granite (regional) Sold by The cubic yard, bulk dump truck delivery What it's good for Final leveling course and joint fill under and between brick and concrete pavers Compacted walkway base (paths, garden walks, stepping-stone runs) Riding arena and round-pen footing (with sand blend) Top dressing on driveways for a smooth, locked surface Setting bed for flagstone and bluestone in dry-laid applications Trench backfill where fine, compactable material is wanted Gradation (AASHTO M43 / ASTM D448 — Size No. 10, typical band) Sieve size % passing ⅜" (9.5 mm) 100 #4 (4.75 mm) 85 – 100 #8 (2.36 mm) 65 – 90 #16 (1.18 mm) 45 – 70 #30 (600 µm) 30 – 50 #50 (300 µm) 17 – 30 #100 (150 µm) 8 – 17 #200 (75 µm) 3 – 10 How much do I need? For a 200 sq ft walkway with a 2" stone dust setting bed, plan on about 1.25 cubic yards. For paver joint sweep-in, a yard covers approximately 2,000–3,000 sq ft of paver field depending on joint width. Use the material calculator at the top of the page for custom dimensions, and round up 5–10% for compaction. How #10 compares to neighboring products #10 vs. #89: #10 packs solid (lots of fines). #89 drains (clean joint stone). Choose by whether the joint should compact or drain. #10 vs. mason sand: Both are fine. Mason sand is rounder and used for mortar. #10 is angular and locks under compaction — better for walkway setting beds. #10 vs. dense pack: Dense pack (or #610) has a ¾"–1" top stone with fines. #10 is just the fines. Use #10 to top a dense-pack base. Blue-gray color variant: Prefer a blue-gray color profile? See our Blue-Gray Granite Dust — same #10 spec, blue-gray granite color. Frequently asked questions What is #10 stone dust used for? Walkway setting beds, paver joint fill, top dressing on driveways, and footing for stepping stones and flagstone. It compacts to a near-solid layer that locks the surface above it in place. Is stone dust the same as #10? Yes — "stone dust" and "screenings" are the trade names; #10 (AASHTO M43 / ASTM D448) is the formal spec name. Same material. Does stone dust drain? Not 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 #57 or #89 instead. Can I use stone dust under pavers? For dry-laid stepping stones and flagstone, yes — it is the standard setting bed. For interlocking concrete pavers, contemporary ICPI guidance prefers concrete sand for bedding; stone dust is still used for joint sweep-in on some installs. How much does a cubic yard of stone dust weigh? About 2,700 lbs per cubic yard, or roughly 1.35 tons. Do you deliver stone dust in the Boston area? Yes — same-day and next-day bulk delivery across Suffolk, Middlesex, Norfolk, and Plymouth Counties. No minimum order; flat-rate delivery shown in the price breakdown. Same-day and next-day bulk delivery, no minimum order. We deliver #10 stone dust across Suffolk, Middlesex, Norfolk, and Plymouth County. Pair with our Dense Pack ¾" to minus or #610 Stone as the compacted base below. Order today — the spec'd screenings every walkway installer reaches for.