HSN Code for Chapter 25 - Salt; sulphur; earths and stone; plastering materials, lime and cement
2501
Salts, incl. 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 (excluding sublimed sulphur, precipitated sulphur and colloidal sulphur)
2504
Natural graphite
2505
Natural sands of all kinds, whether or not coloured (excluding gold- and platinum-bearing sands, zircon, rutile and ilmenite sands, monazite sands, and tar or asphalt sands)
2506
Quartz (excluding natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a square or rectangular shape
2507
Kaolin and other kaolinic clays, whether or not calcined
2508
Clays, andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths (excluding kaolin and other kaolinic clays, and expanded clay)
2509
Chalk
2510
Natural calcium phosphates and natural aluminium calcium phosphates, natural and phosphatic chalk
2511
Natural barium sulphate "barytes"; natural barium carbonate "witherite", whether or not calcined (excluding barium oxide)
2512
Siliceous fossil meals, e.g. kieselguhr, tripolite and diatomite, and similar siliceous earths, whether or not calcined, of an apparent specific gravity of <= 1
2513
Pumice stone; 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 square or rectangular shape; slate powder and slate refuse
2515
Marble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity of >= 2,5, and alabaster, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a square or rectangular shape (excluding in the form of granules, chippings or powder)
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 square or rectangular shape (excluding in the form of granules, chippings or powder, or already with the characteristics of setts, curbstones and flagstones, and monumental or building stone of an apparent specific gravity of >= 2,5)
2517
Pebbles, gravel, broken or crushed stone, for concrete aggregates, for road metalling or for railway 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 and 2516, whether or not heat-treated
2518
Dolomite, whether or not calcined or sintered, incl. dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular "incl. square" shape, and dolomite ramming mix (excluding broken or crushed dolomite for concrete aggregates, road metalling or railway or other ballast)
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 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 (excluding pure calcium oxide and calcium hydroxide)
2523
Cement, incl. cement clinkers, whether or not coloured
2524
Asbestos (excluding products made from asbestos)
2525
Mica, whether or not rifted into sheets or splittings; mica waste
2526
Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a square or rectangular shape; talc
2527
Natural cryolite and natural chiolite
2528
Borates, natural, and concentrates thereof, whether or not calcined, and natural boric acids containing <= 85% of H3BO3 calculated on the dry weight (excluding borates separated from natural brine)
2529
Feldspar; leucite, nepheline and nepheline syenite; fluorspar
2530
Vermiculite, perlite and other mineral substances, n.e.s.
