Marble, travertine 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:

Other calcareous monumental or building stone; alabaster

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

Unroasted iron pyrites

Sulfur of all kinds, other than sublimed sulfur, precipitated sulfur and colloidal sulfur

Natural graphite:

Natural sands of all kinds, whether or not colored, other than metalbearing sands of chapter 26:

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: