To perform grinding lapping of a quenched steel and a hard material by a method wherein a ceramic stone formed such that inorganic long fibers, such as alumina long fibers, are hardened by epoxy resin is used in the cutting edge part of a grinding surface.

A ceramic stone part 1 in which a linear lattice-form groove formed through to an outer end face is formed and a holding abrasive part 2 wherein glass fibers are hardened by epoxy resin are joined together and adhered to each other to produce an integral type ceramic stone grooved hand lapping tool. This tool uniformly, accurately, and rapidly polishes surface by a work to grind and lap the planes of a grinding resisting material, such as a quenched steel, a protrusion, a strike mark. Further, refuse is not generated due to a fall of a grinding wheel as an abrasive and dust, such as polishing chips of a work, is discharged to the outside along a groove. Further, grinding ability is remarkably improved, and the degree of flatness is easily accurately provided. Moreover, since wear is entirely prevented from occurring, an extremely increased life is provided for a took.