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

1. Except where their context or note 4 to this chapter otherwise requires, the headings of this chapter cover only products which are in the crude state or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), crushed, ground, powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or physical processes (except crystallisation), but not products which have been roasted, calcined, obtained by mixing or subjected to processing beyond that mentioned in each heading.

The products of this chapter may contain an added anti-dusting agent, provided that such addition does not render the product particularly suitable for specific use rather than for general use.

2. This chapter does not cover:

1. (a) sublimed sulphur, precipitated sulphur or colloidal sulphur (heading 2802);

2. (b) earth colours containing 70 % or more by weight of combined iron evaluated as Fe₂O₃ (heading 2821);

3. (c) medicaments or other products of Chapter 30;

4. (d) perfumery, cosmetic or toilet preparations (Chapter 33);

5. (e) dolomite ramming mix (heading 3816);

6. (f) setts, curbstones or flagstones (heading 6801); mosaic cubes or the like (heading 6802); roofing, facing or damp-course slates (heading 6803);

7. (g) precious or semi-precious stones (heading 7102 or 7103);

8. (h) cultured crystals (other than optical elements) weighing not less than 2,5 g each, of sodium chloride or of magnesium oxide, of heading 3824; optical elements of sodium chloride or of magnesium oxide (heading 9001);

9. (ij) billiard chalks (heading 9504); or

10. (k) writing or drawing chalks or tailors' chalks (heading 9609).

3. Any products classifiable in heading 2517 and any other heading of the chapter are to be classified in heading 2517.

4. Heading 2530 applies, inter alia, to: vermiculite, perlite and chlorites, unexpanded; earth colours, whether or not calcined or mixed together; natural micaceous iron oxides; meerschaum (whether or not in polished pieces); amber; agglomerated meerschaum and agglomerated amber, in plates, rods, sticks or similar forms, not worked after moulding; jet; strontianite (whether or not calcined), other than strontium oxide; broken pieces of pottery, brick or concrete.