A ceramic knife is a knife designed with a ceramic blade typically made from zirconium dioxide (ZrO2; also known as zirconia).[1] These Utility knife blades are usually produced through the dry-pressing and firing of powdered zirconia using solid-state sintering. It is 8.5 on the Mohs scale of mineral hardness, compared to 4.5 for normal steel and 7.5 to 8 for hardened steel and 10 for diamond. sharpened by grinding the edges with a diamond-dust-coated grinding wheel. When you need a company that can assist you all the way through design through production, we can help. We have the expertise to assist you and look forward to your inquiry.