Novaculite

(n.) A variety of siliceous slate, of which hones are made; razor stone; Turkey stone; hone stone; whet slate.

Thesaurus Entries

aluminum oxide, auto polish, colcothar, corundum, crocus, emery board, emery paper, file, garnet, grindstone, hone, nail file, novaculite, oilstone, polishes, pumice, pumice stone, rasp, rottenstone, rouge, rubstone, sandpaper, shoe polish, silicon carbide, silver polish, steel, strap, strop, wax, whetrock, whetstone, whittle