Section V — Mineral products
Chapter 25 — Salt; sulfur; earths and stone; plastering materials, lime and cement
Heading
2509 Chalk.
Common commodities
Crude natural whitingRaw limestone for artistic purposesPure calcium carbonate mineralNatural chalk blocks for grindingUnprocessed soft white stoneFriable natural calcium carbonateWashed and crude chalk mineralsRaw chalk for artistic applicationsWhiting in block formNatural porous limestone blocks