What materials were used to create knife?

Modern knife blade typically is made out of steel, and the handle can be made out of any hard, non-brittle material, such as plastic, metal, wood, or bone or antler.

However, more exotic materials are used today, such as ceramics and non steel alloys like Talonite and Stellite 6K and 6B, which are Cobalt(Co) based alloys, while steel is Iron(Fe) based alloy.

Special purpose knives are also made with diamond and glass blades, mainly for cutting super thin layers of the sample material.

Prior to steel knife blades were made from flint, obsidian, bronze.