Your Ceramic Knife is an environmental, friendly, chemically stable product, which is rust-free and non-corrosive. Ceramic knives are modern ... years without re-sharpening when you use these stain and rust proof knives, impervious to food acids that eventually discolor ... fish etc.Your Ceramic Knife is an environmental, friendly, chemically stable product, which is rust-free and non-corrosive.The non- ...