Lyme

Ceramic knives are made out of a substance called zirconium oxide. They aren’t metallic whatsoever and have a flat, off-white to bright white color. Their composition is much tougher than steel. Actually, they’re second in line only to diamonds, which are the hardest mineral of all. Worth having a look at, dont you think?
There is another class of ceramic knives that have black blades. These blades start out as white zirconium oxide. With an additional firing process called sintering, they are converted into black zirconium carbide. This process gives the blades the advantage of being even tougher than before. Ceramic knives are the strongest blades out there.

as seen on tv store

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