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Section V - Chapter 25
Salt; Sulfur; Earths and Stone; Plastering Materials, Lime and Cement
Notes
1. Except where their context or note 4 to this chapter otherwise requires, the headings of this chapter cover only products which are in the crude state or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), crushed, ground, powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or physical processes (except crystallization), but not products which have been roasted, calcined, obtain ed by mixing or subjected to processing beyond that mentioned in each heading.

The products of this chapter may contain an added antidusting agent, provided that such addition does not render the product particularly suitable for a specific use rather than for general use.

2. This chapter does not cover:
(a). Sublimed sulfur, precipitated sulfur or colloidal sulfur (heading 2802);
(b). Earth colors containing 70 percent or more by weight of combined iron evaluated as Fe2O3 (heading 2821);
(c). Medicaments or other products of chapter 30;
(d). Perfumery, cosmetic or toilet preparations (chapter 33);
(e). Setts, curbstones or flagstones (heading 6801); mosaic cubes and the like (heading 6802); roofing, facing or damp course slates (heading 6803);
(f). Precious or semiprecious stones (heading 7102 or 7103);
(g). Cultured crystals (other than optical elements) weighing not less than 2.5 g (0.088 ounces) each, of sodium chloride or of magnesium oxide, of heading 3824; optical elements of sodium chloride or of magnesium oxide (heading 9001);
(h). Billiard chalks (heading 9504); or
(ij). Writing or drawing chalks or tailors' chalks (heading 9609).
3. Any products classifiable in heading 2517 and any other heading of the chapter are to be classified in heading 2517.
4. Heading 2530 applies, inter alia, to: vermiculite, perlite and chlorites, unexpanded; earth colors, whether or not calcined or mixed together; natural micaceous iron oxides; meerschaum (whether or not in polished pieces); amber; agglomerated meerschaum and agglomerated amber, in plates, rods, sticks or similar forms, not worked after molding; jet; strontianite (whether or not calcined), other than strontium oxide; broken pieces of pottery, brick or concrete.

Schedule B No. and Headings Commodity Description Unit of Quantity Second Quantity
25 Salt; Sulfur; Earths and Stone; Plastering Materials, Lime and Cement
2501.00.0000 - Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anticracking or free-flowing agents; sea water t
2502.00.0000 - Unroasted iron pyrites t
25.03 - Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur:
2503.00.0010 - - Crude or unrefined sulfur t
2503.00.0090 - - Other t
25.04 - Natural graphite:
2504.10.0000 - - In powder or in flakes kg
2504.90.0000 - - Other kg
25.05 - Natural sands of all kinds, whether or not colored, other than metal-bearing sands of chapter 26:
2505.10.0000 - - Silica sands and quartz sands t
2505.90.0000 - - Other t
25.06 - Quartz (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:
2506.10.0000 - - Quartz t
2506.20 - - Quartzite:
2506.20.0010 - - - Crude or roughly trimmed t
2506.20.0080 - - - Other t
2507.00.0000 - Kaolin and other kaolinic clays, whether or not calcined t
25.08 - Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:
2508.10.0000 - - Bentonite t
2508.30.0000 - - Fire-clay t
2508.40 - - Other clays:
2508.40.0110 - - - Common blue clay and other ball clays t
2508.40.0120 - - - Decolorizing earths and fuller's earth t
2508.40.0150 - - - Other t
2508.50.0000 - - Andalusite, kyanite and sillimanite t
2508.60.0000 - - Mullite t
2508.70.0000 - - Chamotte or dinas earths t
2509.00.0000 - Chalk kg
25.10 - Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:
2510.10.0000 - - Unground t
2510.20.0000 - - Ground t
25.11 - Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:
2511.10.0000 - - Natural barium sulfate (barytes) t
2511.20.0000 - - Natural barium carbonate (witherite) kg
2512.00.0000 - Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less t
25.13 - Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:
2513.10 - - Pumice stone:
2513.10.0010 - - - Crude or in irregular pieces, including crushed pumice kg
2513.10.0080 - - - Other kg
2513.20 - - Emery, natural corundum, natural garnet and other natural abrasives:
2513.20.1000 - - - Crude or in irregular pieces kg
2513.20.9000 - - - Other kg
2514.00.0000 - Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape t
25.15 - Marble, 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 sq
- - Marble and travertine:
2515.11.0000 - - - Crude or roughly trimmed t
2515.12.0000 - - - Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape t
2515.20.0000 - - Other calcareous monumental or building stone; alabaster t
25.16 - Granite, 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:
- - Granite:
2516.11.0000 - - - Crude or roughly trimmed t
2516.12.0000 - - - Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape t
2516.20 - - Sandstone:
2516.20.1000 - - - Crude or roughly trimmed t
2516.20.2000 - - - Merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape t
2516.90.0000 - - Other monumental or building stone t
25.17 - Pebbles, 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
2517.10 - - Pebbles, 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:
2517.10.0015 - - - Pebbles and gravel t
2517.10.0020 - - - Limestone, except pebbles and gravel t
2517.10.0055 - - - Other t
2517.20.0000 - - Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10 t
2517.30.0000 - - Tarred macadam t
- - - Granules, chippings and powder, of stones of heading 2515 or 2516, whether or not heat-treated:
2517.41.0000 - - - - Of marble t
2517.49.0000 - - - - Other t
25.18 - Dolomite, 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; dolomite ramming mix:
2518.10.0000 - - Dolomite not calcined or sintered t
2518.20.0000 - - Calcined or sintered dolomite t
2518.30.0000 - - Dolomite ramming mix t
25.19 - Natural 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:
2519.10.0000 - - Natural magnesium carbonate (magnesite) t
2519.90 - - Other:
2519.90.1000 - - - Fused magnesia and dead-burned (sintered) magnesia kg
2519.90.2000 - - - Caustic calcined magnesite t
2519.90.5000 - - - Other kg
25.20 - Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:
2520.10.0000 - - Gypsum; anhydrite t
2520.20.0000 - - Plasters t
2521.00.0000 - Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement (or for soil improvement) t
25.22 - Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:
2522.10.0000 - - Quicklime kg
2522.20.0000 - - Slaked lime kg
2522.30.0000 - - Hydraulic lime kg
25.23 - Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:
2523.10.0000 - - Cement clinkers t
- - Portland cement:
2523.21.0000 - - - White cement, whether or not artificially colored t
2523.29.0000 - - - Other t
2523.30.0000 - - Aluminous cement t
2523.90.0000 - - Other hydraulic cements t
25.24 - Asbestos:
2524.10.0000 - - Crocidolite t
2524.90.0000 - - Other t
25.25 - Mica, including splittings; mica waste:
2525.10.0000 - - Crude mica and mica rifted into sheets or splittings kg
2525.20.0000 - - Mica powder kg
2525.30.0000 - - Mica waste kg
25.26 - Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; talc:
2526.10.0000 - - Not crushed, not powdered kg
2526.20.0000 - - Crushed or powdered t
2528.00 - Natural 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 weight:
2528.00.1000 - - Natural sodium borates and concentrates thereof (whether or not calcined) kg
2528.00.9000 - - Other kg
25.29 - Feldspar; leucite, nepheline and nepheline syenite; fluorspar:
2529.10.0000 - - Feldspar t
- - Fluorspar:
2529.21.0000 - - - Containing by weight 97 percent or less of calcium fluoride t
2529.22.0000 - - - Containing by weight more than 97 percent of calcium fluoride t
2529.30.0000 - - Leucite; nepheline and nepheline syenite t
25.30 - Mineral substances not elsewhere specified or included:
2530.10.0000 - - Vermiculite, perlite and chlorites, unexpanded kg
2530.20.0000 - - Kieserite, epsom salts (natural magnesium sulfates) kg
2530.90 - - Other:
2530.90.1000 - - - Natural cryolite; natural chiolite t
2530.90.2000 - - - Natural micaceous iron oxides kg
2530.90.8015 - - - Earth colors kg
2530.90.8060 - - - Other kg

Source: U.S. Census Bureau | Foreign Trade | ftdwebm 7;ster@census.gov |  Last Revised: April 22, 2014