Chapter 25:

Salt; sulfur; earth & stone; lime & cement plaster


2501

Salt including table & denatured, pure sodium chloride; sea water

250100

Salt incl tabl a dentrd, pure sodm chlor

2502

Unroasted iron pyrites

250200

Unroasted iron pyrites

2503

Sulfur of all kinds, other than sublimed, precipitated or colloidal sulfur

250310

Sulfur, crude or unrefined

250390

Sulfur, refined, nt sublimed, preciptd or colloidl

2504

Natural graphite

250410

Natural graphite in powder or in flakes

250490

Natural graphite except powder or flakes

2505

Natural sands of all kinds, except metal-bearing

250510

Silica sands and quartz sands, natural

250590

Sands, natural, nesoi

2506

Quartz (other than natural sands); quartzite

250610

Quartz (other than natural sands)

250621

Quartzite, crude or roughly trimmed

250629

Quartzite, other, not crude or roughly trimmed

2507

Kaolin and other kaolinic clays

250700

Kaolin and other kaolinic clays, incl calcined

2508

Other clays, andalusite, kyanite, sillimanite; mullite, chamotte or dinas earths

250810

Bentonite, including calcined

250820

Decolorizing earths and fuller's earth incl calcnd

250830

Fire clay including calcined

250840

Clays nesoi, including ball clays, incl calcined

250850

Andalucite, kyanite and sillimanite

250860

Mullite

250870

Chamotte or dinas earth

2509

Chalk

250900

Chalk

2510

Natural calcium phosphates, natural aluminum calcium phosphates & phosphatic chalk

251010

Ungrnd nat cal phsph, alum cal phos a phos chalk

251020

Nat cal phos, nat al cal phos a phos chlk, ground

2511

Natural barium sulfate; natural barium carbonate not barium oxide barytes, witherite

251110

Natural barium sulfate (barytes)

251120

Natural barium carbonate (witherite)

2512

Siliceous fossil meals & similar siliceous earths of specific gravity of 1 or less kieselguhr, tripolite, diatomite

251200

Siliceous fssl mls a erths w spec grav of 1 o lss

2513

Pumice; emery; natural corundum and garnet & other natural abrasives

251311

Pumice, crude or in irreg pcs incl crushed (abrsve

251319

Pumice, nesoi

251321

Nat abrsvs nesoi crude or in irreg pieces

251329

Nat abrasives excpt pumice, refined

2514

Slate, crude or roughly trimmed

251400

Slate, crude or roughly trimmed

2515

Marble, travertine & other calcareous monumental or building stone of specific gravity of 2.5 or more; alabaster

251511

Marble and travertine, crude or roughly trimmed

251512

Marble and travertine cut in blocks or slabs

251520

Calcrs mnmtl or bldg stone nesoi; alabaster

2516

Granite, porphyry, basalt, sandstone & other monumental or building stone, crude or cut etc.

251611

Granite, crude or roughly trimmed

251612

Granite, cut into blocks or slabs

251621

Sandstone, crude or roughly trimmed

251622

Sandstone, cut into blocks or slabs

251690

Basalt, porphyry and other mnmntl or bldg stone

2517

Pebbles, gravel, brocken or crushed stone; macadam of slag, dross or similar waste

251710

Pebbles, gravel etc. for concrete aggregates etc.

251720

Macadam of slag, dross or similar ind waste

251730

Tarred macadam

251741

Marble granules, chippings and powder

251749

Stone granules, chippings a pwdrs (ex mrbl) nesoi

2518

Dolomite, calcined or not, roughly trimmed etc.

251810

Dolomite not calcined

251820

Calcined dolomite

251830

Agglomerated dolomite (including tarred dolomite)

2519

Natural magnesium carbonate; fused magnesia; dead-burned magnesia; other magnesium oxide magnesite

251910

Natural magnesium carbonate

251990

Fused magnesia; dead-burn magnesia; magnesia nesoi

2520

Gypsum; anhydrite; plasters (consisting of calcium gypsum or sulfate)

252010

Gypsum; anhydrite

252020

Plasters constng of calcnd gypsum or calcm sulfate

2521

Limestone flux; limestone & other calcareous stone used for manufacture of lime & cement

252100

Lmestn flux; lmstn a oth cal sto usd mfr lime, cmt

2522

Quicklime, slaked lime and hydraulic lime

252210

Quicklime

252220

Slaked lime

252230

Hydraulic lime

2523

Cements..portland, aluminous, slag, supersulfate & similar hydraulic cements

252310

Cement clinkers

252321

White portland cement whthr or nt art colored

252329

Portland cement except white portland cement

252330

Aluminous cement

252390

Hydraulic cement, other, nesoi

2524

Asbestos

252400

Asbestos

2525

Mica, including splittings; mica waste

252510

Crude mica and mica rifted into sheets or splttngs

252520

Mica powder

252530

Mica waste

2526

Natural steatite, roughly trimmed or not; talc

252610

Natural steatite and talc, nt crshd, nt pwdrd

252620

Natural steatite and talc, crushed or powdered

2527

Natural cryolite; natural chiolite

252700

Natural cryolite; natural chiolite

2528

Natural borates & concentrates; natural boric acid not more than 85% h3bo3 on dry weight

252810

Natural sodium borates

252890

Natural borates and natural boric acid nesoi

2529

Feldspar; leucite; nepheline, nepheline syenite; fluorspar

252910

Feldspar

252921

Fluorspar contng by wght 97% or under calcm fluord

252922

Fluorspar ov 97 pc calcm fluord by wght

252930

Leucite; nepheline and nepheline syenite

2530

Other mineral substances not specified vermiculite, perlite, chlorites, kieserite, epsom salts, celestite

253010

Vermiculite, perlite and chlorites, unexpanded

253020

Kieserite, epsom salts (natural magnesium sulfate)

253030

Earth colors

253040

Natural micaceous iron oxides

253090

Mineral substances nesoi