corundum

Example Sentences

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Corundum is important to the jewelry trade as ruby and sapphire.

From Textbooks • Feb. 14, 2019

Corundum is used largely for watch-jewels, and for bearings in electrical apparatus.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" by Various

Corundum, Al2O3, is the richest of its ores.

From An Introduction to Chemical Science by Williams, Rufus Phillips

Corundum cannot be powdered in Wedgwood, or even agate, mortars; since it rapidly wears these away and becomes contaminated with their powder.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

Corundum as an abrasive is the mineral of this name—made up of anhydrous aluminum oxide.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)