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Diamond knife blade. A diamond knife is a very sharp knife in which the edge is made from diamond, invented by Humberto Fernández-Morán in 1955. [1] [2] Diamond knives are used for medical and scientific applications where an extremely sharp and long-lasting edge is essential. The knives are very expensive to purchase, depending on the ...
The edge faces the wielder's left when the dagger is held in the ready position. The back of the blade (the dull edge) in this section is usually filed with a series of grooves or notches. The third and longest section of the blade extends to the point, and is double-edged with a diamond cross-section.
The blade is made of steel, and is typically long and slim with a tapering needle point, measuring 12 in (30 cm) or more; the whole dagger can be as long as 20 in (51 cm). Rondel means 'round' or 'circular'; the dagger gets its name from its round (or similarly shaped, e.g. octagonal ) hand guard and round or spherical pommel (knob on the end ...
The U.S. Marine Raider stiletto was similar to the Fairbairn-Sykes fighting knife. Both were designed hilt-heavy to lie in the hand so as to reduce the risk of dropping. Both had a tapered, double-edge blade with stiletto-sharp tip and diamond-shaped cross section, sharpened on both cutting edges all the way to the oval crossguard. Both had a ...
A modern hand-and-a-half sword with a short ricasso. A ricasso is an unsharpened length of blade just above the guard or handle on a knife, dagger, sword, or bayonet. Blades designed this way appear at many periods in history in many parts of the world and date back to at least the Bronze Age—essentially, as long as humans have shaped cutting tools from metals.
The blade is made of non-rustproof carbon steel, blue-plastered by hand and finely forged from the base to the tip of the knife. The 90 mm (3.5 in) long blade shows patina (dark spots) caused by decades of use. It can easily be sharpened to a shaving sharp edge. Carbon steel is a popular choice for rough-use knives and cheaper options.