It is, however, a tool, and though some fine knives will never cut anything but gasps of admiration, even those need some consideration. Jay Fisher's High Quality Custom Knives are built to last for several generations, with sheaths that should last at least one generation with moderate care. Take care of the point, and the rest of the blade will follow. Do not leave knives and sheaths in direct sun or high heat. High ultraviolet oxidizes woods and bleaches the color out of some gemstone.
Heat bakes the protective oils out of most hardwoods and weakens adhesive bonds.
Hand wash blades when necessary with non-abrasive gentle detergent, polish blades and fittings with good quality polish like Simichrome. Clean handles and sheaths with damp cloth and buff with soft dry cloth. Protect carbon steel knives with a light coating of hand-buffed wax, not oil. Oil attracts dust as well as weakens the sheath. Some carbon steel knife blades are blued.