Jeroen Knippenberg of The Netherlands combines three distinct carbon steel alloys, 01, 02, and 75Ni8, to form the mosaic damascus blade of this one-of-a-kind gyuto. Photos simply cannot do justice to the polish, etch, and resulting chatoyance produced by the layers of steel in the finished knife. Stretching from the sculpted, integral handle bolster forward through symmetrical, compound ‘S-grind’ bevels and finally to a glass-thin tip, the Four Leaf mosaic damascus results in a range of visual effects depending on the viewing angle. A contrast with previous builds, Jeroen has shaped from the beautiful material a versatile, thin, and quick 210mm blade that combines the toughness, height, and geometry of a daily-use gyuto, with the precision and edge profile of a slicing knife. In the rear nearest the 55mm-tall heel the blade’s spine is stiff and wide at 3.7mm for demanding cuts, and then, beginning around the half-way mark the spine’s distal taper accelerates, slimming to 2.4mm at the midpoint, then about 1.1mm two inches from the tip, 0.7mm one inch from the tip, and further still. Delicate and fine slices and detail work of a range of ingredients are just what the forward half of this tool was designed for. Balanced just at the center of the mosaic damascus bolster, the knife is nimble and natural in the hand. For comfort and control, meeting the bolster with a stepped, heirloom fit transition and every nuance accounted for, Jeroen has carved a piece of dark, striking amboyna burl to cradle the fingers. At the handle’s rear is a flush, polished stainless retention bolt cap, the outward sign of the handle’s mechanical construction.