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 25.15 or 25.16, whether or not heat-treated.
2517.10.00    - 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
2517.20.00   - Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10
2517.30.00   - Tarred macadam
2517.41.00     -- Of marble
2517.49.00     -- Other