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

Sulphur of all kinds, other than sublimed sulphur, precipated sulphur and collodial sulphur

2504

Natural graphite

2505

Natural sands of all kinds, whether or not coloured, other than metal-bearing 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

2509

Chalk

2510

Natural calcium phosphates, natural aluminium calcium phosphates and phosphatic chalk

2511

Natural barium sulphate (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 stones; 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, in to blocks or slabs of a rectangular (including square) shape

2515

Marble, travertine, ecaussine 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 sulphate) whether or not coloured, with or without small quantities of accelerates or retarders

2521

Limestone flux; limestone and other calcareous stones, 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, supersulphate cement and similar hydraulic cements, whether or not coloured or in the form of clinkers

2524

Asbestos

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% of h3bo3 calculated on the dry weight

2529

Feldspar; leucite, nepheline and nepheline syenite; fluorspar.

2530

Mineral substances not elsewhere specified or included