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Harmonized System
Section V > Chapter 25 > Heading 2517 > 2517.10
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
Section V > Chapter 25 > Heading 2517 > 2517.20
Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10
Section V > Chapter 25 > Heading 2517 > 2517.30
Tarred macadam
Section V > Chapter 25 > Heading 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.
Section V > Chapter 25 > Heading 2518 > 2518.10
Dolomite, not calcined or sintered
Section V > Chapter 25 > Heading 2518 > 2518.20
Calcined or sintered dolomite
Section V > Chapter 25 > Heading 2519
Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure.
Section V > Chapter 25 > Heading 2519 > 2519.10
Natural magnesium carbonate (magnesite)