Sulfate de baryum naturel (barytes) ; Carbonate de baryum naturel (withérite), même calciné, autre que l'oxyde de baryum du n° 28.16 — Sulfate de baryum naturel (barytes)

Salt (including table salt and denatured salt) and pure sodium chloride, whether or not in aqueous solution or containing added anti-caking or free-flowing agents; sea water — With sodium chloride content more than 60 % but less than 97 %, calculated on a dry basis, fortified with iodine

Quartz (other than natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape — Quartzite

Other clays (not including expanded clays of heading 68.06), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths — Chamotte or dinas earths

Slate, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape

Natural calcium phosphates, natural aluminium calcium phosphates and phosphatic chalk — Apatite

Portland cement, aluminous cement, slag cement, supersulphate cement and similar hydraulic cements, whether or not coloured or in the form of clinkers — Of a kind used in the manufacture of white cement

Natural calcium phosphates, natural aluminium calcium phosphates and phosphatic chalk — Apatite

Marble, travertine, ecaussine and other calcareous monumental or building stone of an apparent specific gravity of 2.5 or more, and alabaster, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape — Crude or roughly trimmed