ironstone

A hard white pottery.

A rock containing enough iron to permit commercial extraction; an iron ore.

Any ore of iron which is impure through the admixture of silica or clay.

A hard, earthy ore of iron.

ironstone china.

See under Clay.

a hard white pottery, first made in England during the 18th century.

Any ore of iron which is impure through the admixture of silica or clay.