10. | | 2510 Natural calcium phosphates, natural aluminium calcium phosphates and phosphatic chalk. |
11. | | 2511 Natural barium sulphate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 2816. |
12. | | 2512 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. |
13. | | 2513 Pumice stone; emery; natural corundum, natural garnet and other natural abrasives, whether or not heattreated. |
14. | | 2514 Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. |
15. | | 2515 Ecaussine and other calcareous monumental or building stone; alabaster : other than Marble and travertine. |
16. | | 2516 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. |
17. | | 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; grenules cheeping and powder of stones heading 2515 or 2516 whether or not it treated. |
18. | | 2518 Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; dolomite ramming mix. |
19. | | 2518 10 dolomite, Not calcined or sintered. |
20. | | 2519 Natural magnesium carbonate (magnesite); fused magnesia; deadburned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure. |
21. | | 2520 Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) whether or not coloured, with or without small quantities of accelerators or retarders. |
22. | | 2521 Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. |
23. | | 2522 Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825. |
24. | | 2524 Asbestos. |
25. | | 2525 Mica, including splitting; mica waste. |
26. | | 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. |
27. | | 2528 Natural borates and concentrates thereof (whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85% of H3BO3. |
28. | | 2529 Feldspar; leucite, nepheline and nepheline syenite; fluorspar. |
29. | | 2530 Mineral substances not elsewhere specified or included. |