… Pumice stone; emery; natural corundum, natural garnet and other …
Explanatory notes
… 25.13 ‑ P umice stone; emery; natural corundum, natural garnet and other … is a very porous variety of volcanic rock, rough to the touch and extremely light in weight, usually whitish or … headings of this Chapter . (b) Precious or semi‑precious stones (e.g., ruby, sapphire) of heading 71.03 . (c) …