This material, which is second in hardness only to diamond, was originally developed for industrial applications where metal components failed.
Zirconium oxide is extremely hard, wear resistant, and chemically inert.
You can resharpen your ceramic knife by sending it back to us or by bringing it to a qualified knife shop which has a powered diamond sharpening wheel. Zirconium oxide is a very strong material. Like a forged steel knife, however, you can break the tip if the knife lands on the tip. Fortunately, we can repair most damaged tips under the five year warranty. First, you can chip the edge if you cut into bones.