Chapter 25: Chapter 25

Section HS: Harmonized System

Headings in this Chapter

2501 Salt (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 water

2502 Unroasted iron pyrites

2503 Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur

2504 Natural graphite:

2505 Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:

2506 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:

2507 Kaolin and other kaolinic clays, whether or not calcined

2508 Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths:

2510 Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk:

2511 Natural barium sulfate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816:

2512 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

2513 Pumice; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated:

2514 Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

2515 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 square) shape:

2516 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:

2517 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 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:

2518 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:

2519 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:

2520 Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulfate) whether or not colored, with or without small quantities of accelerators or retarders:

2521 Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement

2522 Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825:

2523 Portland cement, aluminous cement, slag cement, supersulfate cement and similar hydraulic cements, whether or not colored or in the form of clinkers:

2525 Mica, including splittings; mica waste:

2526 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:

2528 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

2529 Feldspar; leucite, nepheline and nepheline syenite; fluorspar:

2530 Mineral substances not elsewhere specified or included: