HS Code Chapter 25: Salt, sulfur, earths, stone, and plaster

2501.00.00 Salt & pure sodium chloride, whether or not in aqueous solution or cont. added anticaking or free-flowing agents; sea water 2502.00.00 Iron pyrites, unroasted 2503.00.00 Sulfur of all kinds, other than sublimed, precipitated and colloidal sulfur 2504.10.10 Natural graphite, crystalline flake (not including flake dust) 2504.10.50 Natural graphite in powder or flakes (other than crystalline flake) 2504.90.00 Natural graphite, other than in powder or in flakes 2505.10.10 Natural silica and quartz sands, containing by weight 95% or more of silica and not more than 0.6% of oxide of iron 2505.10.50 Natural silica and quartz sands, nesoi 2505.90.00 Natural sands, other than silica or quartz sands and other than metal-bearing sands of chapter 26 2506.10.00 Quartz (other than natural sands) 2506.20.00 Quartzite 2507.00.00 Kaolin and other kaolinic clays, whether or not calcined 2508.10.00 Bentonite clay, whether or not calcined 2508.30.00 Fire-clay, whether or not calcined 2508.40.01 Clays, (not including expanded clays of heading 6806), nesoi, whether or not calcined 2508.50.00 Andalusite, kyanite and sillimanite, whether or not calcined 2508.60.00 Mullite 2508.70.00 Chamotte or dinas earths 2509.00.10 Chalk, crude 2509.00.20 Chalk, other than crude 2510.10.00 Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk, unground 2510.20.00 Natural calcium phosphates, natural aluminum calcium phosphates and phosphatic chalk, ground 2511.10.10 Natural barium sulfate (barytes), ground 2511.10.50 Natural barium sulfate (barytes), not ground 2511.20.00 Natural barium carbonate (witherite), whether or not calcined 2512.00.00 Siliceous fossil meals and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less 2513.10.00 Pumice 2513.20.10 Emery; natural corundum, nat. garnet and other nat. abrasives, whether or not heat-treated, all the foregoing crude or in irregular pieces 2513.20.90 Emery; natural corundum, nat. garnet and other nat. abrasives, whether or not heat-treated, all the foregoin not crude or irregular pieces 2514.00.00 Slate, whether or not roughly trimmed or merely cut into blocks or slabs of a rectangular (including square) shape 2515.11.00 Marble and travertine, crude or roughly trimmed 2515.12.10 Marble, merely cut into blocks or slabs of a rectangular (including square) shape 2515.12.20 Travertine, merely cut into blocks or slabs of a rectangular (including square) shape 2515.20.00 Calcareous monument.or build.stone (o/than marble/traver.) of spec. gravity >=2.5 & alabaster, crude, rough, trimmed or cut blocks or slabs 2516.11.00 Granite, crude or roughly trimmed 2516.12.00 Granite, merely cut into blocks or slabs of a rectangular (including square) shape 2516.20.10 Sandstone, crude or roughly trimmed 2516.20.20 Sandstone, merely cut into blocks or slabs of a rectangular (including square) shape 2516.90.00 Porphyry, basalt and other monument. or build. stone (except granite/sandstone), crude or roughly trimmed or cut into rect. blocks/slabs 2517.10.00 Pebbles, gravel, broken or crushed stones, for concrete aggregates, road metalling, ballast, shingle or flint, whether o/not heat-treated 2517.20.00 Macadam of slag, dross or similar industrial waste, whether or not incorporating pebbles, gravel, etc. 2517.30.00 Tarred macadam 2517.41.00 Granules, chippings and powder of marble, whether or not heat-treated 2517.49.00 Granules, chippings and powder, of travertine/calcareous monument. or build.stone (except marble)/granite/porphyry/basalt/sandstone etc. 2518.10.00 Dolomite, not calcined, whether or not or roughly trimmed or merely cut into blocks or slabs of a rectangular (including square) shape 2518.20.00 Dolomite, calcined, whether or not roughly trimmed or merely cut into blocks or slabs of a rectangular (including square) shape 2518.30.00 Agglomerated dolomite (including tarred dolomite) 2519.10.00 Natural magnesium carbonate (magnesite) 2519.90.10 Fused magnesia; dead-burned (sintered) magnesia, whether or not cont. small quant. of other oxides added before sintering 2519.90.20 Caustic calcined magnesite 2519.90.50 Magnesium oxide, nesi, whether or not pure 2520.10.00 Gypsum; anhydrite 2520.20.00 Plasters (of calcined gypsum or calcium sulfate), whether or not colored, with or without small quantities of accelerators or retarders 2521.00.00 Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement 2522.10.00 Quicklime (other than calcium oxide and hydroxide of heading 2825) 2522.20.00 Slaked lime (other than calcium oxide and hydroxide of heading 2825) 2522.30.00 Hydraulic lime (other than calcium oxide and hydroxide of heading 2825) 2523.10.00 Clinkers of portland, aluminous, slag, supersulfate and similar hydraulic cements 2523.21.00 Portland cement (white cement), whether or not artificially colored 2523.29.00 Portland cement (other than white cement), whether or not colored 2523.30.00 Aluminous cement, whether or not colored 2523.90.00 Slag cement, supersulfate cement and other hydraulic cements, nesoi, whether or not colored 2524.10.00 Crocidolite 2524.90.00 Asbestos other than crocidolite 2525.10.00 Mica, crude or rifted into sheets or splittings 2525.20.00 Mica, powder 2525.30.00 Mica, waste 2526.10.00 Steatite, natural n/crushed or powdered, whether or not roughly trimmed or cut into rect. blocks or slabs; talc n/crushed or powdered 2526.20.00 Steatite, natural; talc; the foregoing crushed or powdered 2528.10.00 Sodium borates, natural, and concentrates thereof (whether or not calcined), but not incl. borates separated from nat. brine 2528.90.00 Borates (except sodium borates), natural and conc., but n/incl. borates from nat. brine; nat. boric acid w/not over 85% H3B03 by dry weight 2529.10.00 Feldspar 2529.21.00 Fluorspar, containing by weight 97 percent or less of calcium fluoride 2529.22.00 Fluorspar, containing by weight more than 97 percent of calcium fluoride 2529.30.00 Leucite; nepheline and nepheline syenite 2530.10.00 Vermiculite, perlite and chlorites, unexpanded 2530.20.10 Kieserite 2530.20.20 Epsom salts (natural magnesium sulfates) 2530.90.10 Natural cryolite; natural chiolite 2530.90.20 Natural micaceous iron oxides 2530.90.80 Other mineral substances, not elsewhere specified or included