Emery Paper Sand Paper

"Emery paper" is a type of sandpaper where the abrasive material is emery, a natural mixture of corundum and magnetite, which provides a rougher surface suitable for sanding metal and other hard surfaces. Today, "sandpaper" is a more general term for abrasive paper coated with synthetic grains like aluminum oxide or silicon carbide, with "emery paper" often used as a synonym for an abrasive pape