… Artificial corundum, whether or not chemically defined; aluminium …
Explanatory notes
… 28.18 ‑ Artificial corundum, whether or not chemically defined; aluminium … abrasives and synthetic precious or semi‑precious stones (rubies, sapphires, emeralds, amethysts, aquamarines, etc.), … it is mixed with carbon for the manufacture of anti‑rust paints and is also used, due to its affinity for …