Abstract: An abrasive tool for cutting extremely abrasive-resistant materials includes a novel, abrasive segment with a generally crenelated, rectangular appearance. The segment has a single piece vein of a primary abrasive and first bond material extending completely along the length of the segment. The vein transverses the width of the segment at least once in a non-linear path and alternately coincides with inner and outer faces. Gaps between the vein and the faces opposite the vein coincident faces are occupied by a second bond material, and optionally, a secondary abrasive, thus forming multiple, separated abrasive regions. The bottom surface of the segment is attached to a core at an operative perimeter which defines the cutting edge of the tool. The segment can be adapted to conform to the curvature of diverse cutting edges, and thus can be used in rotary and reciprocating saw blades and core drilling bits.