Abrasive

A very hard, brittle, heat-resistant substance that is used to grind the edges or rough surfaces of an object. Boron carbide, diamond, and corundum are abrasives.

Natural Abrasives

sandstone, emery, corundum, diamonds

Artificial Abrasives

silicon carbide, aluminium oxide

See also: Abrasion, Abrasive Cleaner, Abrasive Wheel, Emery Cloth, Sandpaper.