| 2528.10.00 | 00 | Natural sodium borates and concentrates thereof (whether or not calcined) | kg | Free | | Free |
| 2528.90.00 | 10 | Natural calcium borates | kg | | | |
| 2529.21.00 | 00 | Containing by weight 97 percent or less of calcium fluoride | t | Free | | 13.5% |
| 2529.22.00 | 00 | Containing by weight more than 97 percent of calcium fluoride | t | Free | | $5.51/t |
| 2530 | | Mineral substances not elsewhere specified or included: | | | | |
| 2530.20 | | Kieserite, epsom salts (natural magnesium sulfates): | | | | |
| 2601 | | Iron ores and concentrates, including roasted iron pyrites: | | | | |
| 2601.11.00 | | Non-agglomerated | | Free | | Free |
| 2601.12.00 | | Agglomerated | | Free | | Free |
| 2601.12.00 | 60 | Briquettes | t | | | |
| 2602.00.00 | | Manganese ores and concentrates, including ferruginous manganese ores and concentrates with a manganese con- tent of 20 percent or more, calculated on the dry weight | | Free | | 2.2￠/kg on manganese content |
| 2602.00.00 | 40 | Containing less than 47 percent by weight of manganese | kg Mn kg | | | |
| 2602.00.00 | 60 | Containing 47 percent or more by weight of manganese | kg Mn kg | | | |
| 2603.00.00 | 50 | Gold content | Au g | | | |
| 2605.00.00 | 00 | Cobalt ores and concentrates | kg Co kg | Free | | Free |
| 2606.00.00 | 30 | Bauxite, calcined: | | | | |
| 2606.00.00 | 30 | Refractory grade | t | | | |
| 2607.00.00 | 50 | Gold content | Au g | | | |
| 2608.00.00 | 50 | Gold content | Au g | | | |
| 2610.00.00 | 20 | Having a chromium content equivalent to not more than 40 percent chromic oxide (Cr2O3) | t Cr2O3 t | | | |
| 2610.00.00 | 40 | Having a chromium content equivalent to more than 40 percent but less than 46 percent chromic oxide (Cr2O3) | t Cr2O3 t | | | |
| 2610.00.00 | 60 | Having a chromium content equivalent to 46 percent or more chromic oxide (Cr2O3) | t Cr2O3 t | | | |
| 2611.00 | | Tungsten ores and concentrates: | | | | |
| 2613 | | Molybdenum ores and concentrates: | | | | |
| 2614.00.60 | 40 | Other (including rutile and rutile sand) | kg | | | |
