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corundum
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Example Sentences
Pliny says, corundum was used in the form of a splinter fixed in an iron style.
From Project Gutenberg
The stones have been rubbed into shape apparently by corundum.
From Project Gutenberg
This is true whether it has reference to a grindstone, emery, corundum wheel, or a plain oil stone.
From Project Gutenberg
Corundum and pure emery are ores that are very rich in aluminum, containing about fifty-four per cent.
From Project Gutenberg
Corundum is the hardest substance known, next to the diamond.
From Project Gutenberg
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From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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