… Coral and similar materials, unworked or simply prepared but not otherwise worked; shells of molluscs, … or echinoderms and cuttle-bone, unworked or simply prepared but not cut to shape, powder and waste thereof. …
Explanatory notes
… 05.08 ‑ Coral and similar materials, unworked or simply prepared but not otherwise worked; shells of molluscs, … unworked, or from which only the outer crust has been removed. (2) Coral, simply prepared but not otherwise … foodstuffs, and waste of shells. The heading excludes rods, rectangular (including square) plates and other shapes, …