Natural steatite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape; talc:

Not crushed, not powdered

Crushed or powdered

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: