EMERY

The Grocer's Eneyclopedia · 1911 · p. 4

an impure hard black or greyish-black granular corundum, employed in pulverized form for polishing and grinding metals, ete. Emery Cloth or Paper is coated with a mixture of emery powder and glue. The colored varieties of corundum include the sapphire and several other precious stones. [s. 235]