Pretty knife, but I doubt the veracity of any seller that misrepresents their goods:
From the site that makes this blade (See their fax):
?Q. What are ceramic knives made of?
A. These knives are made of an advanced, high-tech ceramic called zirconium oxide (also called zirconia). This material, which is second in hardness only to diamond?
Cubic zirconia is ~ 8.5 on the relative Mohs scale.
Tungsten Carbide is 9
Silicon Carbide 9-9.5
Boron Carbide is 9.5-9.9
The Mohs scale is ?relative.? so the difference between 8.5 and 9.5 is actually great.
I don?t know if Boron Carbide or other ceramic based, or sintered materials are used in knivemaking but clearly cubic (or the softer silicon) zirconia is not in any way ?second to diamond.?-
I'll stick with a handcrafted mokume gane, or Damascus knife...