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 2001 Schedule B Book - Chapter 25
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 Source: U.S. Census Bureau, Foreign Trade Division, Washington, DC 20233
 Last modified: 12/22/00
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 Schedule B   Description and Unit of Quantity
 Code
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 2501.00.0000    Salt (including table salt and denatured salt) and pure sodium               

                                                                                              
                 chloride, whether or not in aqueous solution or containing                   
                 added anticracking or free-flowing agents; sea water...........              t
                                                                                              
 2502.00.0000    Unroasted iron pyrites.......................................................t

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

                                                                                              
                 sulfur and colloidal sulfur:                                                 
 2503.00.0010      Crude or unrefined sulfur..............................................    t

                                                                                              
 2503.00.0090      Other......................................................................t

                                                                                              
 2504            Natural graphite:                                                            

                                                                                              
 2504.10.0000      In powder or in flakes...................................................  kg

                                                                                              
 2504.90.0000      Other......................................................................kg

                                                                                              
 2505            Natural sands of all kinds, whether or not colored, other than               

                                                                                              
                 metal-bearing sands of chapter 26:                                           
 2505.10.0000      Silica sands and quartz sands.......................................       t

                                                                                              
 2505.90.0000      Other......................................................................t

                                                                                              
 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:                   
                                                                                              
 2506.10.0000      Quartz.....................................................................t

                                                                                              
                   Quartzite:                                                                 
 2506.21.0000         Crude or roughly trimmed.........................................       t

                                                                                              
 2506.29.0000         Other...................................................................t

                                                                                              
 2507.00.0000    Kaolin and other kaolinic clays, whether or not calcined........             t

                                                                                              
 2508            Other clays (not including expanded clays of heading 6806),                  

                                                                                              
                 andalusite, kyanite and sillimanite, whether or not calcined;                
                 mullite; chamotte or dinas earths:                                           
 2508.10.0000      Bentonite..................................................................t

                                                                                              
 2508.20.0000      Decolorizing earths and fuller's earth..............................       t

                                                                                              
 2508.30.0000      Fire-clay..................................................................t

                                                                                              
 2508.40           Other clays:                                                               

                                                                                              
 2508.40.0010         Common blue clay and other ball clays......................             t

                                                                                              
 2508.40.0050         Other...................................................................t

                                                                                              
 2508.50.0000      Andalusite, kyanite and sillimanite.................................       t

                                                                                              
 2508.60.0000      Mullite....................................................................t

                                                                                              
 2508.70.0000      Chamotte or dinas earths.............................................      t

                                                                                              
 2509.00.0000    Chalk........................................................................kg

                                                                                              
 2510            Natural calcium phosphates, natural aluminum calcium                         

                 phosphates and phosphatic chalk:                                             
                                                                                              
 2510.10.0000      Unground...................................................................t

                                                                                              
 2510.20.0000      Ground.....................................................................t

                                                                                              
 2511            Natural barium sulfate (barytes); natural barium carbonate                   

                                                                                              
                 (witherite), whether or not calcined, other than barium oxide                
                 of heading 2816:                                                             
 2511.10.0000      Natural barium sulfate (barytes).....................................      t

                                                                                              
 2511.20.0000      Natural barium carbonate (witherite)..............................         kg

                                                                                              
 2512.00.0000    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.............          t
                                                                                              
 2513            Pumice; emery; natural corundum, natural garnet and other                    

                 natural abrasives, whether or not heat-treated:                              
                                                                                              
                   Pumice:                                                                    
 2513.11.0000         Crude or in irregular pieces, including crushed                         

                                                                                              
                      pumice..................................................................kg
 2513.19.0000         Other...................................................................kg

                                                                                              
 2513.20           Emery, natural corundum, natural garnet and other                          

                                                                                              
                   natural abrasives:                                                         
 2513.20.1000         Crude or in irregular pieces.......................................     kg

                                                                                              
 2513.20.9000         Other...................................................................kg

                                                                                              
 2514.00.0000    Slate, whether or not roughly trimmed or merely cut, by                      

                                                                                              
                 sawing or otherwise, into blocks or slabs of a rectangular                   
                 (including square) shape.................................................... t
                                                                                              
 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:                                                    
                   Marble and travertine:                                                     
 2515.11.0000         Crude or roughly trimmed.........................................       t

                                                                                              
 2515.12.0000         Merely cut, by sawing or otherwise, into blocks or                      

                                                                                              
                      slabs of a rectangular (including square) shape...........              t
 2515.20.0000      Other calcareous monumental or building stone;                             

                                                                                              
                   alabaster..................................................................t
                                                                                              
 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:                                        
                                                                                              
                   Granite:                                                                   
 2516.11.0000         Crude or roughly trimmed........................................        t

                                                                                              
 2516.12.0000         Merely cut, by sawing or otherwise, into blocks or                      

                                                                                              
                      slabs of a rectangular (including square) shape...........              t
                                                                                              
                   Sandstone:                                                                 
 2516.21.0000         Crude or roughly trimmed.........................................       t

                                                                                              
 2516.22.0000         Merely cut, by sawing or otherwise, into blocks or                      

                                                                                              
                      slabs of a rectangular (including square) shape...........              t
 2516.90.0000      Other monumental or building stone...............................          t

                                                                                              
 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:                                                            
                                                                                              
 2517.10           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:                                               
                                                                                              
 2517.10.0015         Pebbles and gravel..................................................    t

                                                                                              
 2517.10.0020         Limestone, except pebbles and gravel........................            t

                                                                                              
 2517.10.0055         Other...................................................................t

                                                                                              
 2517.20.0000      Macadam of slag, dross or similar industrial waste,                        

                   whether or not incorporating the materials cited in                        
                   subheading 2517.10....................................................     t
                                                                                              
 2517.30.0000      Tarred macadam..........................................................   t

                                                                                              
                   Granules, chippings and powder, of stones of heading                       
                   2515 or 2516, whether or not heat-treated:                                 
                                                                                              
 2517.41.0000         Of marble...............................................................t

                                                                                              
 2517.49.0000         Other...................................................................t

                                                                                              
 2518            Dolomite, whether or not calcined; dolomite roughly trimmed                  

                 or merely cut, by sawing or otherwise, into blocks or slabs of               
                 a rectangular (including square) shape; agglomerated                         
                 dolomite (including tarred dolomite):                                        
                                                                                              
 2518.10.0000      Dolomite not calcined...................................................   t

                                                                                              
 2518.20.0000      Calcined dolomite........................................................  t

                                                                                              
 2518.30.0000      Agglomerated dolomite (including tarred dolomite)...........               t

                                                                                              
 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:                                        
                                                                                              
 2519.10.0000      Natural magnesium carbonate (magnesite)......................              t

                                                                                              
 2519.90           Other:                                                                     

                                                                                              
 2519.90.1000         Fused magnesia and dead-burned (sintered)                               

                      magnesia............................................................... kg
                                                                                              
 2519.90.2000         Caustic calcined magnesite......................................        t

                                                                                              
 2519.90.5000         Other...................................................................kg

                                                                                              
 2520            Gypsum; anhydrite; plasters (consisting of calcined gypsum                   

                 or calcium sulfate) whether or not colored, with or without                  
                 small quantities of accelerators or retarders:                               
                                                                                              
 2520.10.0000      Gypsum; anhydrite.......................................................   t

                                                                                              
 2520.20.0000      Plasters...................................................................t

                                                                                              
 2521.00.0000    Limestone flux; limestone and other calcareous stone, of a                   

                                                                                              
                 kind used for the manufacture of lime or cement (or for soil                 
                 improvement).................................................................t
                                                                                              
 2522            Quicklime, slaked lime and hydraulic lime, other than calcium                

                                                                                              
                 oxide and hydroxide of heading 2825:                                         
 2522.10.0000      Quicklime..................................................................kg

                                                                                              
 2522.20.0000      Slaked lime................................................................kg

                                                                                              
 2522.30.0000      Hydraulic lime.............................................................kg

                                                                                              
 2523            Portland cement, aluminous cement, slag cement, super-                       

                 sulfate cement and similar hydraulic cements, whether                        
                 or not colored or in the form of clinkers:                                   
                                                                                              
 2523.10.0000      Cement clinkers........................................................... t

                                                                                              
                   Portland cement:                                                           
 2523.21.0000         White cement, whether or not artificially colored.........              t

                                                                                              
 2523.29.0000         Other...................................................................t

                                                                                              
 2523.30.0000      Aluminous cement ......................................................    t

                                                                                              
 2523.90.0000      Other hydraulic cements...............................................     t

                                                                                              
 2524.00.0000    Asbestos.....................................................................t

                                                                                              
 2525            Mica, including splittings; mica waste:                                      

                                                                                              
 2525.10.0000      Crude mica and mica rifted into sheets or splittings.........              kg

                                                                                              
 2525.20.0000      Mica powder............................................................... kg

                                                                                              
 2525.30.0000      Mica waste.................................................................kg

                                                                                              
 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:                                  
                                                                                              
 2526.10.0000      Not crushed, not powdered...........................................       kg

                                                                                              
 2526.20.0000      Crushed or powdered...................................................     t

                                                                                              
 2527.00.0000    Natural cryolite; natural chiolite.......................................... t

                                                                                              
 2528            Natural borates and concentrates thereof (calcined or not),                  

                 but not including borates separated from natural brine;                      
                 natural boric acid containing not more than 85 percent of                    
                 H3BO3 calculated on the dry weight:                                          
                                                                                              
 2528.10.0000      Natural sodium borates and concentrates thereof                            

                   (whether or not calcined) .............................................    kg
                                                                                              
 2528.90.0000      Other......................................................................kg

                                                                                              
 2529            Feldspar; leucite, nepheline and nepheline syenite;                          

                 fluorspar:                                                                   
                                                                                              
 2529.10.0000      Feldspar...................................................................t

                                                                                              
                   Fluorspar:                                                                 
                                                                                              
 2529.21.0000         Containing by weight 97 percent or less of calcium                      

                      fluoride................................................................t
 2529.22.0000         Containing by weight more than 97 percent of calcium                    

                      fluoride................................................................t
 2529.30.0000      Leucite; nepheline and nepheline syenite.........................          t

                                                                                              
 2530            Mineral substances not elsewhere specified or included:                      

                                                                                              
 2530.10.0000      Vermiculite, perlite and chlorites, unexpanded.................            kg

                                                                                              
 2530.20.0000      Kieserite, epsom salts (natural magnesium sulfates).........               kg

                                                                                              
 2530.40.0000      Natural micaceous iron oxides.......................................       kg

                                                                                              
 2530.90           Other:                                                                     

                                                                                              
 2530.90.0015         Earth colors............................................................kg

                                                                                              
 2530.90.0060         Other...................................................................kg

                                                                                              
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