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abrasive

abrasive, material used to grind, smooth, cut, or polish another substance. Natural abrasives include sand , pumice , corundum , and ground quartz . Carborundum ( silicon carbide ) and alumina (aluminum oxide) are important synthetically produced abrasives. The hardest abrasives are natural or synthetic diamonds , used in the form of dust or minuscule stones.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

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The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.