Harmonized System
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)
Section V > Chapter 25 > Heading 2520
Gypsum; anhydrite; plasters (consisting of calcined gypsum or calcium sulphate) whether or not coloured, with or without small quantities of accelerators or retarders.
Section V > Chapter 25 > Heading 2520 > 2520.10
Gypsum; anhydrite