Explanatory notes
… ( heading 38.24 ). Artificial corundum is put up in small pieces or masses, crushed or in grains; it is more resistant … abrasives and synthetic precious or semi‑precious stones (rubies, sapphires, emeralds, amethysts, aquamarines, etc.), … stones with a basis of aluminium oxide (e.g., artificial rubies) ( heading 71.04 or 71.05 ). …
