Origin of corundum
Words nearby corundum
How to use corundum in a sentence
Pliny says, corundum was used in the form of a splinter fixed in an iron style.
The stones have been rubbed into shape apparently by corundum.
This is true whether it has reference to a grindstone, emery, corundum wheel, or a plain oil stone.Practical Mechanics for Boys|J. S. Zerbe
Corundum and pure emery are ores that are very rich in aluminum, containing about fifty-four per cent.
Corundum is the hardest substance known, next to the diamond.The A B C of Mining|Charles A. Bramble