… Coral and similar materials, unworked or simply prepared but not … worked; shells of molluscs, crustaceans 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 … for articles of jewellery. The most important shell for industrial purposes is that used as mother of pearl. The … prepared but not otherwise worked, i.e., coral not having undergone processes extending beyond simple cutting. (3) …