Explanatory notes
… porcelain or china 6909.12 - - Articles having a hardness equivalent to 9 or more on the Mohs scale 6909.19 - - Other … and pots, for foodstuffs (jam, condiments, meat pastes, liqueurs, etc.), for pharmaceutical products or cosmetics … On the expanded Mohs scale, fused alumina has a hardness equivalent to 12, and silicon carbide has a hardness …