| 2523.21.00 | 00 | Portland cement: |  |  |  |  | 
| 2523.21.00 | 00 | White cement, whether or not artificially colored | t | Free |  | $1.76/t, including  weight of container | 
| 2523.29.00 | 00 | Other | t | Free |  | $1.32/t, including  weight of container | 
| 2523.30.00 | 00 | Aluminous cement | t | Free |  | $1.32/t, including  weight of container | 
| 2523.90.00 | 00 | Other hydraulic cements | t | Free |  | $1.32/t, including  weight of container | 
| 2524 |  | Asbestos: |  |  |  |  | 
| 2524.10.00 | 00 | Crocidolite (Blue) | t | Free |  | Free | 
| 2524.90.00 |  | Other |  | Free |  | Free | 
| 2524.90.00 | 10 | Amosite | t |  |  |  | 
| 2524.90.00 | 30 | Chrysotile: |  |  |  |  | 
| 2524.90.00 | 30 | Crudes | t |  |  |  | 
| 2524.90.00 | 40 | Milled fibers, group 3 grades (spinning fibers or equivalent) | t |  |  |  | 
| 2524.90.00 | 45 | Milled fibers, group 4 and 5 grades | t |  |  |  | 
| 2524.90.00 | 55 | Other | t |  |  |  | 
| 2524.90.00 | 60 | Other | t |  |  |  | 
| 2525 |  | Mica, including splittings; mica waste: |  |  |  |  | 
| 2525.10.00 |  | Crude mica and mica rifted into sheets or splittings |  | Free |  | Free | 
| 2525.10.00 | 50 | Other | kg |  |  |  | 
| 2525.20.00 | 00 | Mica powder | kg | Free |  | 20% | 
| 2525.30.00 | 00 | Mica waste | kg | Free |  | 8.8¢/kg | 
| 2526 |  | Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rect- angular (including square) shape;talc: |  |  |  |  | 
| 2526.10.00 | 00 | Not crushed, not powdered | kg | Free |  | 0.6¢/kg | 
| 2526.20.00 | 00 | Crushed or powdered | t | Free |  | 35% | 
| 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: |  |  |  |  | 
| 2528.10.00 | 00 | Natural sodium borates and concentrates thereof (whether or not calcined) | kg | Free |  | Free |