HTS CodeDescriptionGeneral Rate
2501.00.00.00Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking or free-flowing agents; sea waterFree2502.00.00.00Unroasted iron pyritesFree2503.00.00Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfurFree2503.00.00.10Crude or unrefined sulfurN/A2503.00.00.90OtherN/A2504Natural graphite:N/A2504.10In powder or in flakes:N/A2504.10.10.00Crystalline flake (not including flake dust)Free2504.10.50.00OtherFree2504.90.00.00OtherFree2505Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:N/A2505.10Silica sands and quartz sands:N/A2505.10.10.00Sand containing by weight 95 percent or more of silica and not more than 0.6 percent of oxide of ironFree2505.10.50.00OtherFree2505.90.00.00OtherFree2506Quartz (other than natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:N/A2506.10.00QuartzFree2506.10.00.10Sands (other than natural) containing by weight 95 percent or more of silica and not more than 0.6 percent of oxide of ironN/A2506.10.00.50OtherN/A2506.20.00QuartziteFree2506.20.00.10Crude or roughly trimmedN/A2506.20.00.80OtherN/A2507.00.00.00Kaolin and other kaolinic clays, whether or not calcinedFree2508Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:N/A2508.10.00.00BentoniteFree2508.30.00.00Fire-clayFree2508.40.01Other claysFree2508.40.01.10Common blue clay and other ball claysN/A2508.40.01.20Decolorizing earths and fuller's earthN/A2508.40.01.50OtherN/A2508.50.00.00Andalusite, kyanite and sillimaniteFree2508.60.00.00MulliteFree2508.70.00.00Chamotte or dinas earthFree2509.00Chalk:N/A2509.00.10.00CrudeFree2509.00.20.00OtherFree2510Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:N/A2510.10.00.00UngroundFree2510.20.00.00GroundFree2511Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:N/A2511.10Natural barium sulfate (barytes):N/A2511.10.10.00GroundFree2511.10.50.00Other$1.25/t2511.20.00.00Natural barium carbonate (witherite)Free2512.00.00.00Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or lessFree2513Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:N/A2513.10.00Pumice stoneFree2513.10.00.10Crude or in irregular pieces, including crushed pumiceN/A2513.10.00.80OtherN/A2513.20Emery, natural corundum, natural garnet and other natural abrasives:N/A2513.20.10.00Crude or in irregular piecesFree2513.20.90.00OtherFree2514.00.00.00Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shapeFree2515Marble, travertine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:N/A2515.11.00.00Crude or roughly trimmedFree2515.12Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:N/A2515.12.10.00MarbleFree2515.12.20.00Travertine3%2515.20.00.00Other calcareous monumental or building stone; alabaster3%2516Granite, porphyry, basalt, sandstone and other monumental or building stone, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:N/A2516.11.00.00Crude or roughly trimmedFree2516.12.00Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape2.8%2516.12.00.30Having a thickness of 7.5 cm or moreN/A2516.12.00.60OtherN/A2516.20Sandstone:N/A2516.20.10.00Crude or roughly trimmedFree2516.20.20.00Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape3%2516.90.00Other monumental or building stone3%2516.90.00.30Having a thickness of 7.5 cm or moreN/A2516.90.00.60OtherN/A2517Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling, or for railway or other ballast; shingle and flint, whether or not heat-treated; macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in the first part of the heading; tarred macadam; granules, chippings and powder, of stones of heading 2515 or 2516, whether or not heat-treated:N/A2517.10.00Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling, or for railway or other ballast, shingle and flint, whether or not heat-treatedFree2517.10.00.15Pebbles and gravelN/A2517.10.00.20Limestone, except pebbles and gravelN/A2517.10.00.55OtherN/A2517.20.00.00Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10Free2517.30.00.00Tarred macadamFree2517.41.00.00Of marbleFree2517.49.00.00OtherFree2518Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:N/A2518.10.00.00Dolomite, not calcined or sinteredFree2518.20.00.00Calcined or sintered dolomite3%2519Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure:N/A2519.10.00.00Natural magnesium carbonate (magnesite)Free2519.90Other:N/A2519.90.10.00Fused magnesia and dead-burned (sintered) magnesiaFree2519.90.20.00Caustic calcined magnesiteFree2519.90.50.00OtherFree2520Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:N/A2520.10.00.00Gypsum; anhydriteFree2520.20.00.00PlastersFree2521.00.00.00Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cementFree2522Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:N/A2522.10.00.00QuicklimeFree2522.20.00.00Slaked limeFree2522.30.00.00Hydraulic limeFree2523Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:N/A2523.10.00.00Cement clinkersFree2523.21.00.00White cement, whether or not artificially coloredFree2523.29.00.00OtherFree2523.30.00.00Aluminous cementFree2523.90.00.00Other hydraulic cementsFree2524Asbestos:N/A2524.10.00.00Crocidolite (Blue)Free2524.90.00OtherFree2524.90.00.10AmositeN/A2524.90.00.30CrudesN/A2524.90.00.40Milled fibers, group 3 grades (spinning fibers or equivalent)N/A2524.90.00.45Milled fibers, group 4 and 5 gradesN/A2524.90.00.55OtherN/A2524.90.00.60OtherN/A2525Mica, including splittings; mica waste:N/A2525.10.00Crude mica and mica rifted into sheets or splittingsFree2525.10.00.10Split block micaN/A2525.10.00.20Mica splittingsN/A2525.10.00.50OtherN/A2525.20.00.00Mica powderFree2525.30.00.00Mica wasteFree2526Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; talc:N/A2526.10.00.00Not crushed, not powderedFree2526.20.00.00Crushed or powderedFree2528.00.00Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 percent of H3BO3 calculated on the dry weightFree2528.00.00.05Natural sodium borates and concentrates thereof (whether or not calcined)N/A2528.00.00.10Natural calcium boratesN/A2528.00.00.50OtherN/A2529Feldspar; leucite, nepheline and nepheline syenite; fluorspar:N/A2529.10.00.00FeldsparFree2529.21.00.00Containing by weight 97 percent or less of calcium fluorideFree2529.22.00.00Containing by weight more than 97 percent of calcium fluorideFree2529.30.00Leucite; nepheline and nepheline syeniteFree2529.30.00.10Nepheline syeniteN/A2529.30.00.50OtherN/A2530Mineral substances not elsewhere specified or included:N/A2530.10.00.00Vermiculite, perlite and chlorites, unexpandedFree2530.20Kieserite, epsom salts (natural magnesium sulfates):N/A2530.20.10.00KieseriteFree2530.20.20.00Epsom saltsFree2530.90Other:N/A2530.90.10.00Natural cryolite; natural chioliteFree2530.90.20.00Natural micaceous iron oxides2.9%2530.90.80OtherFree2530.90.80.10CelestiteN/A2530.90.80.15Earth colorsN/A2530.90.80.50OtherN/A